The people mad about this are so weird to me. Like hes obviously entertaining to a huge audience and he himself has joked about this. Hell, last year's winner @ironmouse Voted FOR HIM. (Edit:she voted for him in best fps and gave support but did vote for mori as best vtuber)
Also him winning proves you dont need a 5 figure model and deep lore commissioned. You just need to be entertaining and use what you got as best you can.