Can't Climb!!!!!!

I always watch videos on how to improve and climb. I play a small handful of champions and master them, I stick only to 2 lanes (Mid and Support), I mute the whole enemy team, don't focus on chat and play my best. I play pretty often but don't seem to improve; I'm almost demoted to Bronze 1. I don't know what else to do and could use some advice. Thanks! :p
Report as:
Offensive Spam Harassment Incorrect Board