How to get a breakthrough
The most important thing is to slow down and think ahead. In your recent game against HerrBertJrgen, you blindly stepped into a pawn fork at d5 on move 12, you made a very unwise capture on move 18 (opening the e-column for an attack on your queen), and you hung a rook (with check) on move 23. By that point you've got a minute more time than your opponent, but your game is totally lost.
These aren't necessarily huge mistakes (your opponent made a couple blunders too), but an average of a blunder every seven moves is going to result in a lot of lost games.
Ten-minute games are a good length for getting in some practice, but if you want to improve you have to *really* slow down and try to plan ahead; put yourself in your opponent's shoes. Play some 3-day or seven-day matches and be very deliberate about avoiding blunders. Once you get into that habit, bring that discipline to your ten-minute matches.
It takes some practice to learn to spot blunders quickly. My assignment to you: Don't look at the clock for the next three games. Accept that you are likely to lose on time. Your goal is only to be ahead on material (and/or in a clearly winning position) when the clock runs out.
You may find that you are still making blunders and need more tactical practice. You may find that you are doing much better but are running out of time after ten moves and should play slower time controls. You might find that you are doing better *and* that you don't need as much time as expected.
With experience, slowing down early can pay dividends. You will foresee more of your opponent's moves, more of the development of the game as a whole. You can stay a few steps ahead without burning lots of additional time in the later stages of the game.
PS make sure you analyse all your games. Click that big green "Review" button after each match. Don't expect all your moves to be best moves, but take the time to understand *why* one move is better than another. And pay attention to anything marked as a blunder.
Wow, this game was wild: https://www.chess.com/analysis/game/live/141495007214/review?move=28 See what I mean about your opponent making blunders too? Capitalize on just one or two of them and you win this game easily.
For the last week you've played A LOT of games. But before that your chess has been pretty spotty with weeks and months in between. I think if you managed to just play 1 or 2 games a day, and do it consistently every single day, plus reviewed each game afterwards - I think that would go a long way to your improvement.
Also, you've played a lot of blitz, and if you are having trouble improving I would warn against it. Blitz in some cases can make you worse - you need time to practice your calculation skills. It's great to practice what you already know once you've gotten enough experience to develop instincts, but until you get to that point, you won't be improving with it and you may pick up bad habits.
The Vienna is a good opening you could try! I am 1750 and got a nice attacking game with a brilliant move on move 4!!!
Learn exactly how to think in the opening, middlegame and endgame — this is what I teach.
Always blunder-check your moves.
Solve tactics in the right way.
Analyze your games.
Study games of strong players.
Learn how to be more psychologically resilient.
Work on your time management skills.
Get a coach if you can.
@nartreb I would love to review all of my games, but I do not have premium so cannot review all of my games. The ones I can I typically do. Instead of 10 minute games I have been playing 30 minute Games, so I have more time to think.