Why can't I play consistently

I'm just looking for some advice to become a more consistent player. Some of my games I am somehow able to play with accuracy in the 80's and 90's, while other games I play terribly with accuracy in the 40's or 50's. Sometimes I don't blunder at all while other times I blunder many times. How can I improve?

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

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

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You need to improve situational awareness. Blundering comes from the fact that you don't have taken the time to understand the situation on the board. If you got 90 percent, you understand the situations very good. If you had  50 percent, you didn't understand the situations very well.

Als you need to understand that chess has a snowball effect, the bigger the difference between black and white pieces, the harder it is to prevent blundering as the losing color. So it is obvious that some games are 90 percent and other 50 percent. Mainly the 50 percent games you are probably allready behind, so preventing blunders become harder in those games. 

An artificial way to increase your accuracy is to just resign right after you are behind a piece, that way your accuracy increase. 

Hi! My name is Lauren Goodkind and I’m a respected  chess coach and chess YouTuber who helps beginners out : 

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

Send me one of your games and I'll be happy to analyze the game for free on my YouTube channel on Sunday livestream from 1-2PM PST.  Ask me questions in real time!  

 This is a great way to improve!

Here’s more  ideas to help you get better.  

-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?”. Do this for every single move!  

-Play with a slow time control, such as G/30 so you have plenty of time to think before every move. 

It seams from your rapid games that your lower accuracy games are generally when you are playing a player that is at least 100 rating points, and sometimes 200 or more rating points higher than yours. It would make sense that your score would be lower. They will pose more problems for you to solve, and the weaknesses in their position are not going to be as obvious for lower rated players. Also you will have to play more precise to do well, especially when you may not respond as correctly to their threats. Your accuracy will get better as you improve as a player.