I don't particularly care for NTR or humiliation or whatever, and I don't really attach to male protags, self insert or have any investment in that.
I do quite like cheating/netori/sluttification focused stories though, and since I saw discussion and reviews making it sound like Gretchen is the primary protagonist, and being a fan of bimbo proportions, I was morbidly curious enough to try the game.
The game sort of took me for a spin, as it feels very volatile in quality and how much enjoyment I was getting out of it. It was a lot more juvenile and edgy than I was expecting, and I had a lot of trouble telling what was intentional black comedy or not.
I'll put my overtly large tangents in the spoiler. Basically I like a lot of what people already mentioned starring GG, and strongly dislike the other parts of the game.
So yeah, ridiculous amount of rambling, the game made me think on it, which is probably a good sign. I am definitely going to keep track of the direction it takes, since despite how much I disliked, I also found it compelling. If it goes down a darker route with the fetishes and kinks, I hope the tags are appropriately updated, as I did feel a bit mislead.