That's really, really sad. We don't have a lot of muscle femdom content, and The Alpha Gender renders were fantastic.
About fetishes, sure, one could say that we could have more femdom in ch 1 and 2, but the last release (ch 3) was simply awesome, that French boss wasn't just for the show. It had everything we love about femdom.
As for his commentaries about AI, I understand his pain, as there is a lot of bullshit being said here and there about works being replaced by AI, but really... a lot of things are simply overestimated. While AI does has a great potential, it probably will be a good tool for creative minds instead of replacing good artist, and society plays a good role in this case (people usually give more value to an average work on Daz3D or even HS2 than a beatiful piece of AI generated work, simply because it was done by human hands).
And finally, about negative bullshits throwed up by people, honestly... I think people have an awful tendency to grab a keyboard as quick as the light when it comes to criticize things, but are slower than a slug when it comes to give a compliment. I include myself on that, as I really didn't write a review or said that the game was great after we had this release (I didn't support either, but honestly, the only reason why I don't support the games I like is the fact I'm a 3rd world autist struggling to survive).
Femdom itself is a subject of criticism in this community, it's hard to find a femdom game without people giving away their disregards because it is femdom or ppl asking a "turn the tables on the mistress" and other maledom contents to the devs.
Now, femdom muscle is a whole new tier for these people, even for those who likes ordinary femdom (in this last case, sometimes it's all about insecurities - "am I gay just because I like buffed gals slapping my ass, lifting me and making me lick her pussy?"). Actually, I think that's why you'll find more muscle futa content, because those people don't give a fuck to it, since they already love chicks with dicks and don't care about "hur dur ur gay for liking it".
I love muscle femdom and I think we could have more of it, that's why The Alpha Gender was a great title imo - the dev was doing a great job in this game.
That said, criticism is also a sign that your game is reaching relevance (there's no recipe for the success, but if you want to surely fail, all you have to do is to try to please everyone). So, I think it was quite early for him to give up. Success comes with consistency, great devs like BoWei/Koda, Darktoz, Salia Coel and even Dekarous didn't have an amazing start (Sunny Coast College was a joke, but he did a good job with Domina and conquered his Patreon base). But nowadays, they reached the spotlight for femdom devs.
So really, I'd rethink this decision. The Alpha Gender has potential to grow.