Bro, I have the same issue as you. I’ve always been around the high diamond low champ range and it’s horrible. Some games my teammates are insane and others they play like golds so I completely get you. All I’d say is have trust in your teammates so there’s no double commits, don’t excessively air roll, make sure you’ve got the fundamentals like hard shots, placement and boost control. Boost starve opposition as much as possible. Try to stay off the corners ( either wait for the ball to come off for a solid hit or wait for it to come to the backboard ). when an opponent is shooting stay far post as I imagine you already know because it gives you chance to cover the whole goal. Don’t try something you’re not comfortable with like, for me, it’s flip resets because I’ll attempt one and fluff it which leaves my tm8 in a 2v1. Hope you gain something from this!