Most of the jank came from attempting things that were a bit too ambitious for a small studio, monastery quest is a good example.
Having just beaten the game for the second time, I've found the monastery quest less insufferable than on my first run, but it's so unbelievably janky.
1) Too much of the monastery quest consists of staring at the loading screens. Your every day at the monastery goes like this - you wake up, go to the mass, press "wait" and look at the loading screen. Go have breakfast, speak to the novices there (if you must), press wait, look at the loading screen. Go to the alchemy lab, make a potion, press "wait", look at the loading screen. Go to the library, watch the cutscene of Henry sitting down, translate the text, press "wait", look at the loading screen. Go to the mass, press "wait", look at the loading screen. Have dinner, press "wait", look at the loading screen. The night comes, you now have the opportunity to go about your business as you please, because the circators spend the entire night at drinking and gambling at the cellar, so nobody is actually patrolling the monastery to create the engaging stealth game experience.
Was this really the best way possible to design this quest's gameplay? Why not just make the mass a cutscene, and autoskip 2 hours after you finish your job at the alchemy lab and the library? The game clearly wants you to do all your dirty business at night, so it's not like there's incentive to skip mass, or play truant after finishing your potions for the day. Was staring at all those loading screens really necessary?
2) It's the first time stealth and lockpicking come into the focus and demand you to use them, and fuck you if you've been playing a good boy Henry who never stole or cheated in his life. Now that I think about it, I think there is actually a way to beat the quest without lockpicking (go to the cellar, see the circators drink, find out about Lucas' bullying, ask the circators to stop, find out from Lucas that Antonius is a fraud, confront Antonius, get out by buying the key from Cellarius with money you get from Jodok's stash), but that requires ridiculous level of precision - I never managed to trigger Lucas's quest in my first playthrough, because I think you need to ask Jodok about him after you're already buddies with the circators. It also may require finding the dagger you find in a locked chest. I'll test it around some in my free time.
3) Unfulfilled potential. Reporting the circators to the prior does nothing, reporting violations to the election guy does nothing, the election plotline goes nowhere.