Do I need to throw out all my books by misogynists? Do I need to avoid businesses that employ racists?
The "line" is drawn explicitly at supporting ideologies that will cause negative impactful futures for those involved.
Your arguments of "throwing out books" or "avoiding businesses" are just bait to try to get me to say "No" to any of them so you can justify them.
If you knew a book was misogynist by nature, you would (hopefully) avoid it because it has terrible things in it that you don't want to support. If this is an old book, likely no proceeds are going to the person who wrote it (as they might be dead!).
People that employ racists is a
much harder thing to discern, which is something you'll likely engage in without realizing it.
The point is that having the control over what you want to consume and support is the basis of engineering the reality and life you want to see yourself and others have.
Knowing when to use that effectively is a major point of life. You have to act to engender change, and the action here is to stop this game from making too much money to embolden the creator to create more works that espouse his views, which negatively impact people.