Riot should improve their banning system

I've recently lost several ranked games because of players going afk, trolling and feeding. Losing lp is a great deal for me because I've dedicated a lot of my time into the game and when some dude starts trolling in my games it p!sses me off. And I think Riot should compensate for the lp loss(only if the player(s) are doing good and don't deserve to lose lp)Please Riot, improve the banning system and introduce strict rules.
Report as:
Offensive Spam Harassment Incorrect Board