The best way to improve is to constantly learn.
At this level, people are always going to play trash opening and stupid stuff so if you focus on opening and learn to refute all trash openings, you'll be able to get great results. And also blunders are some thing you have to focus on.
In one of your games, a person played the scholars mate and managed to win. This opening is one of the most cheapest tricks of all time. Let me give you a few games I destroyed my opponent with refutes. (Try checking the games with the explorer, there is too many wins, but if you want some separate games I'll give it. )
i realized that a bit late