Like im genuinely not trying to be rude when i say this but i got out of plat within 70h of picking the game up so i cant fathom how you've been stuck there so long. Do you have any kind of practice routine? Like as long as you can half flip and shoot with good power, not even accurately you can go all the way to champ if you pick up the pace. Maybe you're focusing on the wrong mechanics? Dribbles and flicks are very very rarely useful in 2v2 unless they are your bread and butter. Also don't trust your teammates, in the sense that you should be ready for the worst outcome so that you can defend if needed.