How did I get banned and not Chat Restricted?

How did I get 14 day banned and not just chat restricted? Chat Logs: So I got banned for calling someone who LITERALLY ran it down mid, taking farm from jungler and being AFK (No joke, this is what he did) for being bad and shit, I get banned, while he can troll more and not get punished... Nice system Riot.
Report as:
Offensive Spam Harassment Incorrect Board