In your most recent game, you did literally 300 damage to champions the entire game. At best, you were intentionally avoiding interacting with the enemy team at all. At worst, you were AFK farming which is punishable as intentional feeding/griefing.
This ban looks completely valid from the publicly available statistics. The Yi game you linked was from 3 days prior to your most recent game. It would appear that you try very hard to not help your team in multiple of your recent games. One game, I could say you had a bad game. But in reviewing many of your recent games, it appears that you very well may be intentionally trying to lose some of them. I will defer to Riot, who has already said that you were intentionally feeding or griefing - as I can't determine for certain from public statistics if you were or not. But it sure does look like it, and given you've had Riot confirm that, there's nothing more to say.
Next time maybe don't queue up if you're just going to not help your team, be that by AFKfarming, leaving the game, dancing around, or whatever you were doing in not just that game but other games as well.
On a moderation note, I have removed your call for players to look for a specific person in that game. Attempting to start witch hunts against other players is not acceptable on the boards. If you have any questions about this please do not hesitate to contact us in the Boards Moderation Discord server.
game?