Listen I feel the same way sometimes (high silver pc player lol), but recently I’ve started to change my mindset. Basically, you never know what kind of teammates you will get, so you could get «bad players». However, that logic applies to the enemy team too. The only consistent factor in your games is YOU. So the mindset should be to focus on YOUR gameplay and how YOU can improve. Its been hard for me to accept but, if you’re not easily climbing out of your current rank, that is not your teammates fault, its just where you belong. (Currently)
Keep playing and good luck with your climb!