I remember you asked me for training, and I remember that whenever I gave you some advice on what to do differently you were arguing that that was not going to work (actually many people do that...). I saw the same in your forum threads: when somebody gives you a suggestion you argue that it won't work. You want to become better, but you don't want to change anything in how you play. Even in this post you say "I am a basic player, my opening build is usually t1 spam and if I get the advantage guncom. If I deviate from that playstyle I am even worse". So here's some advice: try the advice you get before you conclude that it will not work. It is certainly possible that all that advice is wrong, but if you're not going to try it, how would you know?
There are several aspects to how good somebody plays:
1. Strategy. How much land and how much air will you make? When will you go t2 land? When t2 air, t2 navy? How much eco do you expect to make? Where will you send the acu? Do you need to make early drops to expansions? What are good places to raid? Where is the good reclaim? When will you make a t2 pgen? This is very map dependent, and you should know your general plan even before the game started.
2. Tactics. Drops, tml, snipe power, scouting before attacking, reclaiming after a fight, reacting to t2 air, timings of when you can expect a lab, bomber, or raid to arrive, etc.
3. Micro. Good unit formations, targeting the right units with your acu, not walking units into pds, dodging, air micro, etc.
4. Efficiency. Not wasting time with your units, eco balance, adjacency, not making pgens before hydro ^^, etc.
From the replay you should be able to see which of these things you can improve. And if you can't see that then ask help
#1 and #2 is mostly a matter of knowing what to do. You can watch replays by good players to steal what they do. #3 and #4 is mostly a matter of practice, and you should watch your own replays to see what went wrong and then focus on doing it right the next time.