I'm terrible at chess

You have to practice more

Here you go:

https://www.chess.com/blog/nklristic/the-beginners-tale-first-steps-to-chess-improvement

I hope this will be helpful. Have fun improving your game.

Always check your intended move is no blunder before you play it.

learn about basic opening principles. practice on puzzles, watch video lessons. if you want to improve then you should devote 50% of time you can devote to chess to training and practice and the rest 50% to playing games.

Have you considered checkers? Just kidding. You know have fun, play because you enjoy but when you can go over your games, do relevant puzzle, learn a few openings as black and white you enjoy playing and ask others for assistance. When I started playing otb many years ago there was a man in the under 1200 section who played in most events. Years later I have moved up but he still plays there, why because he enjoys playing has no delusions about becoming World Champion, GM or Master. 

Improving Your Chess - Resources for Beginners and Beyond...

https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

https://www.chess.com/blog/RussBell

Good advice!

Play Longer Time Controls...

For many at the beginner-novice level, speed chess tends to be primarily an exercise in moving pieces around faster than your opponent while avoiding checkmate, in hopes that his/her clock runs out sooner than yours. Or being lucky enough to notice and exploit your opponent’s blunders before they exploit yours.

The point is, there is little time to think about what you should be doing.

It makes sense that taking more time to think about what you should be doing would promote improvement in your chess skills.

An effective way to improve your chess is therefore to play mostly longer time controls, including "daily" chess, so you have time to think about what you should be doing.

This is not to suggest that you should necessarily play exclusively slow time controls or daily games, but they should be a significant percentage of your games, at least as much, if not more so than speed games which, while they may be fun, do almost nothing to promote an understanding of how to play the game well.

Here's what IM Jeremy Silman, well-known chess book author, has to say on the topic...
https://www.chess.com/article/view/longer-time-controls-are-more-instructive

And Dan Heisman, well-known chess teacher and chess book author…
https://web.archive.org/web/20140627052239/http:/www.chesscafe.com/text/heisman16.pdf

https://www.chess.com/blog/RussBell/dan-heisman-resources

and the experience of a FIDE Master...
https://www.chess.com/forum/view/general/how-blitz-and-bullet-rotted-my-brain-don-t-let-it-rot-yours

All you're playing is speed chess.  You are bot going to improve playing fast.  You are not giving yourself time to think.

If you cannot go through these lists on each move without losing on time.  Then youre playing to fast.

Opening Principles:

1. Control the center squares – d4-e4-d5-e5
2. Develop your minor pieces toward the center – piece activity is the key
3. Castle
4. Connect your rooks

Tactics...tactics...tactics...

The objective of development is about improving the value of your pieces by increasing the importance of their roles. Well-developed pieces have more fire-power than undeveloped pieces and they do more in helping you gain control.

Now we will look at 5 practical things you can do to help you achieve your development objective.

They are:

1. Give priority to your least active pieces.

• Which piece needs to be developed (which piece is the least active)
• Where should it go (where can its role be maximized)

2. Exchange your least active pieces for your opponent’s active pieces.
3. Restrict the development of your opponent’s pieces.
4. Neutralize your opponent’s best piece.
5. Secure strong squares for your pieces.

Don’t help your opponent develop.

There are 2 common mistakes whereby you will simply be helping your opponent to develop:

1. Making a weak threat that can easily be blocked
2. Making an exchange that helps your opponent to develop a piece

Pre Move Checklist:

1. Make sure all your pieces are safe.
2. Look for forcing moves: Checks, captures, threats. You want to look at ALL forcing moves (even the bad ones) as this will force you look at, and see the entire board.
3. If there are no forcing moves, you then want to remove any of your opponent’s pieces from your side of the board.
4. If your opponent doesn’t have any of his pieces on your side of the board, then you want to improve the position of your least active piece.
5. After each move by your opponent, ask yourself: "What is my opponent trying to do?"

Longer time controlls, 10 min, 15|10, etc. More puzzles for sure, and take a break from playing and study, learn on opening, watch a few educational videos. 

Chess is about thinking, not throwing pieces randomly.

Also, do not resign, at your level there's a high chance your opponent might stalemate. 

     You are just playing blitz because that is fun. You see that losing all the time is not a lot of fun. Unfortunately, it takes a good bit of work to become good enough at chess to really enjoy it--the most enjoyable part is playing well, not just winning.

     All the posts that suggest playing longer games are right. If you wish to improve you must take time to think about your moves and investigate all your possibilities (and watch out for all your opponents' possibilities). Once you become more proficient you can play speed chess for fun, but you need to know what you are doing.

     Lessons and videos here can teach you a lot, but a good book aimed at beginners is your best bet. There a lot of recommendations in forums here--check "For Beginners". My suggestion is Tarrasch's "The Game of Chess" (be sure to get the algebraic edition).

     If you truly find chess interesting it will take some time and effort to really become competent at this fascinating game. Good luck.

Hi! My name is Lauren Goodkind and I’m a respected  chess coach and chess YouTuber based in California: 

https://www.youtube.com/channel/UCP5SPSG_sWSYPjqJYMNwL_Q

I have tips and resources to help you improve your chess skills so you can win more games: 

-I  offer a  free beginner’s free eBook on my website, www.ChessByLauren.com in case you are interested. The book is about asking questions before each move.  

-Learn basic tactics such as the fork, discovered attack, pin, and more.  I offer interactive puzzles on my website: https://www.chessbylauren.com/two-choice-puzzles.php  

-I recommend two books for you: “50 Poison Pieces”   and “Queen For A Day: The Girl’s Guide To Chess Mastery.”  Both books are available on Amazon.com.  Both books are endorsed by chess masters!  

-If you are serious about chess, I highly recommend you hiring a chess coach to help you.  

-Also consider all checks and captures on your side and also your opponent’s side. Always as, “If I move here, where is my opponent going to move?”

I hope that this helps.  

Do more lessons, do lots of puzzles, and play lots of games. Play people and easy bots. Turn on the help function with the easy bots use it like a teacher sitting next to you saying "Are you sure about that move?" Analyze your games and understand why your blunders and mistakes were bad. You can do it!