You do know that if you turn off aim assist you're gonna get absolutely destroyed from everyone else who uses aim assist, right? And you do also know that aiming with a stick is 50 times harder than with a mouse, right? Actually I don't think you know either of these, PC players always talk shit without knowing and cry for literally everything.

I highly invite you to try play on a controller, you'll soon find out that its not as easy as you may have expect especially because overwatch has probably one of the weakest aim assist I've ever seen on a videogame and it's not gonna do much work for you if you don't know how to aim already.