Is this really 600 elo gameplay???

I got into chess a few years ago like many of you and have played on and off ever since. In the last year or two I’ve played considerably less chess than before, and I wanted to try getting back into it more seriously. So, I decided to load into some blitz games and I struggled to win even a single game. I felt I was playing very solidly for my rating but my opponents were just wearing me down and making very few blunders. Most of the games, including the example I show below, I am able to get into at least an even position. But then I unable to find winning moves to close out the game.

[Event "?"]
[Site "Chess.com iPhone"]
[Date "2026.03.28"]
[Round "?"]
[White "mwcarlson00"]
[Black "papacuz"]
[Result "0-1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
[WhiteElo "648"]
[BlackElo "676"]

1. e4 e5 2. Nf3 f6 3. Bc4 Bc5 4. Nxe5 fxe5 5. Qh5+ g6 6. Qxe5+ Qe7 7. Qxh8 d6 8. Qxg8+ Qf8 9. Qxf8+ Kxf8 10. c3 c6 11. d4 Bb6 12. Bf4 Bc7 13. O-O Na6 14. Nd2 b5 15. Bb3 b4 16. c4 c5 17. d5 Bd8 18. Rfe1 Be7 19. Re3 g5 20. Bg3 h5 21. Rf3+ Kg7 22. h3 g4 23. hxg4 Bxg4 24. Re3 Bg5 25. Rd3 Be2 26. Nf3 Bxd3 27. Nxg5 Kg6 28. f4 Re8 29. Re1 Nc7 30. Re3 Bb1 31. Nh3 Bxe4 32. f5+ Kxf5 33. Re1 Rg8 34. Rf1+ Kg4 35. Rf4+ Kxg3 36. Ng5 Rxg5 37. Rg4+ Rxg4 38. Bd1 Rf4 39. Bxh5 Rf2 40. Bf3 Bxf3 41. gxf3 Rg2+ {0-1}


Are there any tactics I can practice towards the end of the middle game and during the endgame that would help me find more winning/forcing moves before I eventually make a blunder? Thanks for any suggestions, and I would have added more games but I couldn’t figure out how to add more than one on mobile.

Please send a link, instead of this.