Can’t get out of 5k-10k in premier

As the title says I’m hard stuck. I’d love any advice on how to get out of this pit. I’m somewhat new to the game but I was an amateur cod player years ago made a good chunk of change off of it. Needless to say I have very good game sense. I have played tons of practice matches and I feel my aim is very strong. But the problem is always my teammates. Am I just hard stuck forever? I drop 30 kills and lose half the time. I’d say I’m decent but there’s no way I clutch my way to 10k+.