- bland character design
- already saturated competitors space (Overwatch and dozen of OW clones)
- very recent controversy of Helldivers game requiring a Sony account
- social justice politics
So it's mostly politics, but I really don't believe Overwatch clone could be successful, unless it tries to do something very unique. Concord had nothing. Their main hook was 'nextgen graphics' and a movie-like trailer. And as we can see, good graphics isn't enough to sell a game.
Wanting to play as conventionally attractive/cool characters is not some sort of political stance. It's perfectly normal and unpolitical.
The act of saying the above out loud has become political in a few English-speaking places. However for the most part people just like to pretend it's been turned into a taboo subject.
Generally, there isn't a taboo political topic here at all. The few outliers on either far end of the spectrum are easy to ignore.