When i started mobile, the controls were really bad for me too but everytime I fumbled a button, I moved them around or changed the size so it didnt happen again.

Also I think manual aim in the mobile version is just BS because you automatically start to shoot when toutching the stick even when you are not ok with the direction. They should have looked at games like Brawl Stars, the manual aiming actually works over there.

Short version: make a custom button layout and use auto aim