The first game in that series tried to take itself seriously but a bunch of streamers played it as a joke game and laughed at how stupid it was and he intentionally made the next one a lot more absurd. Including a clip where used a missile to blow up a couple of youtubers who had been critical of the series. He does not exactly take criticism of his games or himself well at all. I actually figured he would eventually go too far in some way and get booted off the platform entirely.
At any rate, I am still a bit surprised Valve ever allowed any adult games on the platform, cartoony or otherwise. Online payment services have a history of dropping businesses because of adult content because it is not worth the hassle, especially in the US. I think the people who get mad over stuff like this are in for a rude awakening when Valve eventually decides the genre in general is not worth it and goes back to doing away with even the games with adult content that they allow now.
GOG and Epic both refused to sell this particular game as well.