I've been hardstuck gold 4 for a while now. And I know it's because of my own level of skill, but there is something that makes me lose a lot of games and that is players trying out new champs.
They will come into my game with 0 experience on the champ and then they just die to their laner over and over untill it's impossible for the team to recover (because keep in mind it's low gold/high silver)
I thought maybe a sollution to this is a lock. If you don't have at least 30/40 games on a champ, you can't take him into ranked.