I think it's because it's always a pain in the ass to give you project to someone you don't know, and you have to find that said person.Nearly month delay is WILD even for them. I get it when they started - not much experience and all that.. But now it 8(!) years of same updates in already existing game. In visual novel for fucks sake)) how can you not learn anything for that long!?
And noone would care if game was shit, but art still good. Even after he bimbofied every girl, they still look pretty! But why cant he hire a competent dev or finally learn how his game works?
However, let's be honest, you don't have 20 days of delay because of bugs on a visual novel. He's probably either lazing off, or that code is so annoying it's making him procrastinate.
That's always the very frustrating thing, even though it's pretty obvious he's milking is patreons, other games does way worse so you're like "at least updates are consistent"