"ExcessM likes shotas being completely dominated by females, to the point they will humiliatingly receive foreplay instead of actual sex because they are not deemed worthy enough to receive it."
That's what you like.
Replace ExcessM with Troufas.
ExcessM includes loli characters in all of his works, including the original onee-shota.
ExcessM likes small boobs, and big boobs.
He definitely has a preference for foreplay over intercourse, but there are intercourse only enemies in his works as well, so he's clearly not so biased in one direction that he wants it predominantly.
Literally every special scene in Parade Buster has intercourse.
Every scene with the main heroine is intercourse.
It isn't the fact he did add intercourse in the previous games, it is the why, and why it was so scarce.
A single work out of many that has a different theme just shows us one of the few healthy experiments made by the artist.
You're misremembering.
One-Syota and Kariyume were two games that were like 90% foreplay/ 10% intercourse.
Parade Buster started going in the other direction with like 80% foreplay 20% intercourse. Hell even the beginner enemies had intercourse scenes, in the special level drain event.
Nowadays it's a 70/30 lean. Most enemies have two foreplay moves, and 1 intercourse. Some have 3 foreplay in Hagokoro and Yumesame.
this is just me looking for reasons for him to be flipping out.
Then listen to what he's actually saying.
He's saying people are complaining they can't get the game to work and troubleshooting for the western audience stresses him out.
He's saying people are saying mean things about the lack of content in this work in comparison to his prior works, specifically Parade Buster, and Yumesame (which they are objectively correct on) and that stresses him out.
He's saying a bunch of discord fans bombarded him saying they were disappointed so he's done with the western community.
I am also biased in that I actually progressively enjoyed his games less and less with said modifications, my favorites still being his first 3.
At least you're self-aware.
My favorite's Yumesame, but there's one thing I agree with you on. The protagonists of his games are action heroes, which completely defeats the purpose of even having a shota protagonist. Onee-shota was always about the fantasy of being overpowered by a larger and more dominant woman. I feel like he can't reconcile his sexual fantasies with his gameplay predelections.
Gen in Hagokoro is in fact is an adult in the first scene, so it's not like he can't do femdom with an adult man and still keep the femdom elements. But whatever, as he makes more games he'll be more and more aware of his own nature, and make changes accordingly.
What else will be "balanced" next? He added a single loli, maybe he should just have half onee sans, half lolies, maybe a few scenes with shotadom instead because why not, maybe add a few oniichans and have some gay play who knows right.
What's the problem?
Just stop buying when he does that.
If his games are still good, and the maledom fans financially support him after he goes full maledom then ExcessM will just be another developer you ignore among the large list of developers.
He has agency. Everything he does is his choice. If people whisper in his ear, it's him that's choosing to listen or ignore it. The whispers themselves aren't at fault.