Even if he cheats, he won't find anything here.

With all due respect, you are wrong in this case. Judging by these episodes, you treat unknown players in the lobby as bots, with whom you can behave however you want – if you’re in the mood, you play; if you’re tired, you quit. This is fundamentally wrong: their interests are just as important to the administration as yours. The rules are the same for everyone. If you start a ranked game with someone, be kind enough to finish it or surrender. If you get tired of playing and you definitely don’t want to continue (and your opponent doesn’t agree to simply end the game), surrender. Otherwise, it’s a rage quit and bad manners, and it doesn’t matter whether it’s done because you’re tired or because you want to farm points. So, the RO (restriction order) is quite deserved, and if similar episodes repeat, it could even lead to a ban. Of course, it would be stupid to get banned in this way. But that’s your fault, not the administration’s – it should be obvious that you shouldn’t behave inappropriately. In fact, you can remove this RO – to do this, you need to upload saves with those players and surrender in them (or finish the game). Or somehow resolve the issue so that these players write to the administrator that they have no complaints.