I play so good in deathmatches but when I go into a game I don't play like in the deathmatch at all (crouch spray, missed headshots, EXT). Can anyone help or at least give me the name of the problem so i can see videos on how to stop doing...

Im aware that the consensus is that counter strafing is not nearly as important in valorant. However, would it be helpful to learn it If I want to be competitive and climb to high elo?

I noticed that every game, my valorant screen keeps tabbing out after a few minutes at the start of the game. I also play League and it turns out that every 5minutes and 30 seconds in-game, it tabs out and I need to alt-tab it immidiately....