After reviewing some of your games, youre losinig for the same reason all beginners lose:
Missing simple tactics.
Hanging pieces.
Your time would be better spent following opening principles. Studying openings isnt going to help you not hang pieces, and miss tactics.
Often when lower rated players asks for advice about opening, they are told that they should not study openings. I on the other hand believe, based on my experience, that lack of opening understanding is one of the things that prevent lower rated players from advancing. Before getting into opening studies lets deal with a few typical objections.
Some people say that lower rated players should study endgames. Spending a lot of time studying endgames would be a major waste of time for this group. The vast majority of games by lower ranked players do not reach the end game, and even when they do, one side normally will have a major material advantage. This does not mean that endgame theory is useless. Everyone should now have to mate with two rooks vs kind, queen, vs king, and rook and king vs king. Learning the above may require a few hours. Openings and endings are similar in that the higher your rank the more you need to know.
Some people say that lower rated players should study tactics. These are smart people and I agree with them. The lower your rank, the larger role tactics play, and the larger the percentage of your study time should be spent on tactics.
Some people say that lower rated players should study games of maters. These are also smart people and I agree with them as long as the games studied are tactical in nature.
The fact that lower rated players should study tactics and the games of classical masters, dose not exclude them studying some openings.
Some people say that lower level players should study opening theory and or principles, and not specific openings.
Can you study a specific opening and not being studying opening theory at the same time?
Can applying opening principles consistently lead you to the best move during the opening phase of a game between two low rated players? For example what move is suggested by opening principles for whites 3 move in the Dominion’s Gambit? Surely not moving the knight for a second time. Likewise can you make the best moves in the Two Knight’s defense without going against opening theory? And we are only talking about the first 4 to 5 moves.
The problem with opening principles for lower rated players is that they are build on the assumption that each player will engage in a struggle for control of the center at the start of the game. At the lower levels of play, combatants are more interested in the fact that 1.e4 release the Queen and Kings Bishop, than the fact that it establishes a foot hold in the center, and often their second move is more about attacking f7 than trying to control the center.
I’m not suggesting that lower rated players learn multiple openings 20 moves deep. The fact is that players at lower level don’t stay in the book very long. For example players rated below 1000 frequently play book openings but only for 1 to 4 moves. I’ve noticed that most game between these players do start out e4,e5.
In the early days of modern chess it was generally agreed that the best moves for white were 1 e4, 2 Nf3 and 3 Bc4. It is my opinion that these are still the best moves for white for lower rated players who naturally play tactual chess. During that time there was a major debate over what move Black should play in response to 2 Nf3. As I recall there are 8 possible moves. Eventually it was agreed that 2 Nc6 was best. I believe that the best way to learn to play the opening phase of a chess game well, is to memorize the first 5 to 10 moves of a line in the Italian Game, for both sides, and then learn why moves not consistent with the main line are not as strong. You have to learn how to take advantage of the lesser moves. Some will be so weak as to lose almost at once, others will be nearly as strong as the main line. It is also very important to analyze the first 10 moves of every game you play with the help of a stronger player or a computer. In this way you will build your knowledge of common positions, and as everyone knows it is often the player who understands the position best who wins, and not the person with the best position. For example those rated below 1000 by playing 1 e5 will need to learn how to follow up on the 3 positions that result from the following move sets.
1. 1 e4 2 Nf3 3 Bc4
2. 1 e4 2 d4 (not very common, but for when your opponent dose not seize part of the center or plays the French etc.)
3. 1 e4 2Nf3 3 d4 ( Philidor, Petroff, etc.)
Black and to some extent White will also need to learn how to respond to early Queen attacks such as 2 Qh5.
When your opponent does deviate from the main line first look at the resulting tactical threats and then opening principles to guide you in responding.
In summary to improve your opening play select an opening, memorize the first 5 to 10 moves, understand why the non-book moves are not as strong and now to take advantage of these weaker moves. Play your chosen opening as much as possible and analyze each and every game preferably with help.
Following the above method I went from well below 1000 to the low 1200. I also studied a lot of tactics and played over many master games. The line I chose to play as Black or White is:
1 e4,e5 2 Nf3, Nc6 3 Bc4, Bc5 (I believe that Bc4 is more understandable than Bb5) 4 Nc3, Nf6 5 d3, d6 (I chose d3 because I can play it if Black plays 3 Nf6 as well and get to the same position) 6 Be3, Bb3. If you exchange on e3 it opens the f file for white. If you exchange on b3 it opens the a file for Black.
It was very rare against players rated below 1200 to play all 6 of these moves, however I normally was able to play the first two.