Originally Posted by 10thVangola
Considering the fact it took him 9 times to get permaban while other people, like i said take about 3-6 bans to get permaban.
This really is in the wrong area (it should be posted in the Tribunal area IMO), but I'm going to answer it anyway.
The tribunal system uses, among other things, tiers of punishments. I'm sure you're familiar with this as you went through the whole warning and increasing severity of bans thing. However what you either don't know or seem to be forgetting is that your tier can decrease over time. While they haven't (and probably will never tell us) how long it takes for your ban tier to decrease it is not inconceivable for someone to clean up their act for a few months, have their ban tier lowered and then start re-offending, thus racking up new bans and going back up the ladder.
So no, I don't see any favouritism here. What I see is someone who periodically cleaned up their act, but then fell back into old habits and eventually got himself perma-banned. Riot even said that his toxic activity increased by 30% in the time leaded up to his perma-ban.
Edit: It has also been mentioned that among the highest elo players it is less common for people to be reported for toxic behaviour. You can make your own wild guesses about this, but I'd guess it's because they all play each other so much no one wants to be "that guy".