There was no bias before, whites are just the most relatable, attractive and fit to be the center of attention. Nobody complained about BJ, Nathan Drake, Joel, Kratos and Geralt, know why? Because they're great fucking characters. That certainly didn't stop gamers loving characters like Lara, Faith, Ciri. There were less females in games, but considering the people who play games are 90% male, that's how it should be. Before, there was balance.
Quality is thrown out the window in favor of political agenda now. ME Andromeda was a massive flop, the laughing stock of the internet. Everyone can see through it, everyone dislikes it: nobody wants to play as a lesbo in a zombie game, nobody wants to play with BJ's daughters instead of him, nobody wants to play a black soldier in a war that had 99.9% whites - that's not only wrong as hell but disrespectful to the people who died.
Lastly, whites pretty much built the modern world. The race has achieved far more than all others combined, so... it's pretty fair they get represented in media more.