Merc aiming on console (Xbox X series) needs a fix pls!

I love the Merc, probably one of my favorite classes of any RPG (I really mean that!) there is a problem with aiming though.. whenever I'm aiming at a boss or elite and they summon hordes my aiming goes haywire and I start trying to aim at several enemies at once and I have to do a weird figure eight to line up my shots. If we/I could get a fix on that I would be ever so grateful!
I am absolutely loving this game GGG.. wayyyy better than PoE1... No offense to the OG... Anyways aim is slightly messed up
Sincerely
Kontagian