He ragequitting all time in the final

There is nothing that can be done with RQs.
Best to do is just join another tourney until he leaves. Or just keep trying to win.

On the contrary, if enough evidence (screenshots) can be gathered of him ragequitting on multiple occasions, we may be able to take action.

Oh, so if someone RQ like all the time, we can report that?

If it becomes that much trouble, yes.

Evidence is required.

MMkay, thank you for the info.