teammate bans yur champ?WTF TRIGGERED o_o

what is being done to stop this?? cuz sometimes ppl do off meta things wth their mains and make a killing. iam a top lane garen main i got mid because so many ppl doge i got auto filled i asked to top....no u cant ok no problem m8. IT was a RIVEN top lane and banned my champ like wtf i got immediate triggered by this shit i was last pick as well.. WHY ARE RIVEN MAINS LIKE THIS???
[zombie-brand-facepalm]