Making female characters in video games less appealing to straight men is less a function of atonement and more driven by sexual motivations. It's part of a larger effort against beauty standards (which is to say "beauty.")
The idea is to remove beautiful women from media and prop up unattractive women in their place and portray them as beautiful. The reason for this is because prog-lib woman who care about this stuff have objectively unattractive physical traits and tend to be closer to middle age. This puts them at a disadvantage in the sexual market because men prefer younger, beautiful women. By attempting to change what female beauty is, and by branding being attracted to beautiful women as oppressive and toxic, they intend funnel attractive men towards unattractive women and away from beautiful women.
This has the side-effect of also funneling unattractive and average men to them. So they also have introduced rules, selectively applied only to unattractive and average men, regarding when and where and how it is acceptable ask a woman out. If one follows these rules, one discovers that it's only acceptable to ask a woman out on a dating app. But in the apps, you both have to pick each other to send a message, so effectively unattractive and average men can't ask a woman out there, either. This bars unattractive and average men from taking action in the dating market at all, leaving only the attractive men who have been funneled away from attractive women.
In video games specifically, there's an additional element. The general perception is that men who play video games are unattractive. So, why try to alter unattractive men's perception of beauty at all? They're not. To women, unattractive and average men are invisible. I mean that near-literally. They just don't notice them independently. Their brains filter these men out somewhere before conscious thought. However, when knowledge of the existence of an unattractive or average man is imposed on their attention, they hate it. Especially if it reminds them that these men have sexuality. Women tolerate, in the abstract, the existence of unattractive and average men as unnoticed worker bees who keep the world functional, but outside of that they find those men's existence offensive and have unlimited scorn for them. So when they see a beautiful woman in a video game, they are reminded that men who play video games like it. This reminds them that those men possess a sexual aspect to their nature, and it causes in them more hate than they could ever muster for any rapist or murderer.