Not true if you were banned you definitely deserved it (chat ban or ban ban?), I've been pretty toxic and worse I ever received was a chat restriction for a few games. Second you telling your lane to, "control your FUCKING lane" is toxic and does nothing to help the team nor does it make your teammate play any better. Plus I'm pretty positive just like I have that you probably say more then that and sorry bud, but that behavior is toxic to the team and only increases your chance of losing.
I do agree with the last part. Riot definitely is sh** when it comes to banning trolls. I definitely rather have someone rage a little than an afk or just straight troll build off meta pick. This doesn't mean that you should be verbally toxic in games tho, because Brah if you really want to win then understand that you shitting on your teammate really doesn't do anything, except let get some primal pleasure from satisfying your impulsions.