i am a firm believer in the whole medium to low fov thing since it means bigger targets and less fish eye (should still work fine on 90/ 100 hor fov since you hardly even flick those distances , you are not instantly turning into shroud by playing for a short time it takes a while and some never reach that level of consistency , also that mode you are playing isnt great for improving gun skill since it rewards corner camping and just holding angles etc ,
ideally youd play bot modes and train your brain that way or go for 2v2 3v3 modes on tournament style maps elim/bomb modes are great too since you get fixed spawns