ゲーム本能

If you really want to get better at competitive games, what you need to do is increase the things you can do unconsciously. Watch out for long-range enemies, predict enemy locations, read the map, know skill cooldowns... nothing anyone can do right from the start.
The best way to acquire this skill is to do it consciously at first, and then, through repeated practice, become able to do it unconsciously. Masu.
Create a to-do list that you can use over and over again with this app, and check it after each match to stay conscious of your actions.
Any area that requires repeated practice can be practiced outside of games as well.