punishments

Trolling/inting/ruining games = chat bans

100% false. Trolling/inting, when punished, is met with an instant 14 day suspension, and then a permanent ban for repeated offense. Riot does not issue chat restrictions for these offenses because it would do no good, since the issue is not the player abusing chat. The biggest issue here is that it's incredibly difficult to create an automated system to punish gameplay offenses quickly and efficiently without also having a decent number of false positives, something that Riot wants to avoid as much as possible.

Cursing at people = perma bans.

Again, false. Cursing by itself is not something that is punished. Cursing at other players to insult them is when a punishment will occur, but this is more about the fact that you're insulting another player and less about the words you use. Really, the only blacklisted words/phrases are things like racial/homophobic slurs or death threats/encouraging suicide.

Also, unless you use the aforementioned blacklisted words, chat offenses are met with at least 2 different chat restrictions and a 14 day suspension before a permanent ban is issued. If you go through those 3 punishments and are still harassing and insulting others through chat, you have essentially shown Riot that you have no intention of changing your behavior and following the rules. The permanent ban is Riot's way of telling you that they've had enough and want you gone from their game.

I know you want to complain about the system, but try not to just outright lie when doing so.

Proof?[sg-lux-2]

i don't know about that, but the system is flawed and is primarily based on numbers of reports on said person.