That is such a dumb take. Just because there's one specific part
This doesn't sound like "just one":
People aren't here for your RPG mechanics, they suck
You're saying the rpg parts as a whole, "they" isn't just "one specific part". Which is a pretty weird complaint because if you want to skip all the rpg mechanics he gave you a recollection room that lets you skip all the rpg stuff right from the beginning, all of them unlocked already. You can get to the hentai scenes in like 30 seconds without getting into a single rpg mechanic.
those skeletons are such a time sink that players just give up.
You say
those and now you're saying the problem is just one specific part, huh. And again, complaining about a time sink when all the hentai scenes are available to you anytime if you just want to get through the rpg stuff. I just don't get it. He even gives you that npc that lets you straight up manipulate the affection level for you or the ntr guy. I don't think there's anything more generous than just letting you control that on top of the recollection room being accessible whenever you want.
I guess you really want the combat and dungeon stuff which is weird because it's not like those are particularly great or have much substance, it's used for some interactions and wacky moments. I wouldn't treat this like those other rpg maker h-games that are very combat-driven anyways, I thought the bigger appeal of this game was the ntr stuff.
But yeah in my opinion what needs improvement is not the dungeons or rpg mechanics. There's a lot of wasted potential like seeing the NTR man fucking the girls during that dark hide and seek minigame or the girls talking more shit towards Kazuma/pulling more pranks on him while pleasuring the other man, if on the NTR route. Stuff like that. I actually like this game a lot, even when I say it's not like one of those combat driven adventure h-games where I'm seriously levelling up and trying to find great gear. For me the rpg stuff is secondary and the interactions between characters are more important so I'm not as bothered by the dungeons.
(The only letdown of the game for me is that foursome scene you peek at when all the girls get corrupted. It's alright but I wanted a more exciting position, or maybe just more foursome scenes everytime you check back in? Also the recollection room doesn't have that Wiz titfuck scene you see in Vanir's vision or that scene where they make Kazuma pass out, so I'm not sure if I've seen it all yet. The game isn't finished yet but I'm looking forward to all the updates!)