How am I supposed to practice?

I can't take it anymore. Normals suck so bad. Too many tryhards. I am sick of losing lane, just because the enemy is a complete tryhard. Every time I face players who pick their most played champions and they always stomp me, just because I want to try something out. It's bullshit, how am I supposed to improve? I mean I do literally every mistake possible and they all punish me for that. I can't improve everything at once, it's impossible. I can't focus on single mistakes, because there are tons of others I make.
Report as:
Offensive Spam Harassment Incorrect Board