what am i doing wrong

Have you changed your warm up routine or antrhing in your set up

u gotta build your confidence back, but not confidence in terms of aggression and taking fights but confidence in your ability to play well.

Maybe go on a smurf or smth to build that or play a few dms. (dont endorse smurfing but it can be good for building confidence).

I read "this used to be me" and a Iögo ad with a singing muffin started playing in my head

then grind deathmatch and get better mechanics then to stop being inconsistent

you cannot aim and use util without practice. you give up on yourself too easily. you can only play those agents because that is the box you put yourself in. branch out, no one is good at a new thing immediately especially in a competitive environment.

if you cant throw util and aim at the same time that just means you need to practice and grind that synergy out, every agent you mentioned needs to throw util and aim at the same time to be good at a high level (jett using the smoke for quick one ways, raze satchels for taking fights etc), if youre bad at something that just means you need to focus on that particular thing and improve before you move on to a different area that you think needs improvement, so when you queue ranked try focusing on just taking fights for a while, and after that try getting good with including utility in these fights you take, think about how a piece of util couldve made that fight go better (sometimes youll just lose fights and get shit on, and thats okay) but ultimately if you wanna be good you have to be able to use utility effectively, your mechanics (aim, movement) with enough practice just becomes second nature to you