Yeah the dates thing is an issue but it is because they take the Steam release of the game. That and they take from the last award to the next one not a calendar year. So RD2 was a 2020 game awards on Steam.
But yeah it feels weird I agree.
The most supported one I understand but the idea is to not have the same game every year even if it has been supported plenty otherwise Terraria would still be there…
The Witcher case I do not know… But the issue there is like any public voted stuff people don’t always vote based on category but they vote what they like. Or maybe they only played that game of the category so they vote that one etc… Some places might play with the numbers around behind the curtains and choose another one if it doesn’t make sense… but that also doesn’t feel right.