Gaming was predominantly marketed towards children. In the age of mature video games and competitive gaming the traditional mascot just doesn’t really fit anymore.
Mascots are a bit of a dying breed, and for years now have been seen as remnants of a gaming landscape that no longer exists. They’re only really talked about retroactively. Younger gamers look at these characters with no connection to them and ask “Wait, why was that cool?” and older gamers will most likely answer nostalgically “You weren’t there, they just were."