Every character has tons of dialog...
95% of it is spam.

The spam is mostly jokes. every day can ask them to tell you a new joke. the jokes are numbered. MC is laughing uproariously every time. I giggle a bit occasionally but mostly just not funny.
some have "wisdom" to dispense too. which are just proverbs. like a fortune cookie.

these vastly over inflate the dialog count and have absolutely nothing to do with the game itself.

My WT for you:
Close the game.
Then Delete the game
And download another porn game without minigames.

Any other games like this one?

In a nutshell, people pay who they virtually want to have sex with. I believe there's a whole industry like that some where. These games and the people who pay them are the reason why the gaming industry looks crap. Then there's games like Summertime Saga and Eternum that's like "hey, here's a free game, pay us if you like the product". They're successful, so why not do just that instead of paywalling people? I get that the Summertime way wont always work, but this is definitely not a good alternative.

I have played 10+ similar games and I believe it's the lack of quality in general is on the decline. I am sad the summertime saga did not age well, the quality shifted over time and then updates stopped. Nowadays there are way too many bad quality games. This game here world of sisters is definitely one of the better ones and devs are trying to make the stuff accessible and not use paywall to milk money. 3 weeks ago community wanted cheat and in patron update they added it within a week with skip options through conversations, minigames, etc. Kudos to devs here. Sadly other creators are not doing updates that often or even at all.

What people hate so often is the personalized experience, what pleases one person doesn't have to please others, for example I enjoyed game called Four Elements, even Slut trainer games, What a legend and WITCH too. Not a single game is perfect but these were the ones with more sex scenes and somehow managed story like the inspired original series.

You can skip through the conversations you dislike or do it like some people here by using cheat code ''GOODGAME'' that unlocks entire sex scenes gallery and watch them without playing the actual game. It's quite easily accessible. (Just a tip - the code has to be added in the game after you enter it or load it, not directly from the menu)

What other games have you played, maybe I could advice you something similar?