Well, those are good tips what to look for. Tutorial doesn't return you to the game and going to the bookstore crashes for new players. Probably because I just reworked the way inventory and shops work (it used to break with rollback sometimes), but some references to old code might remain.
I playtest the game quite a lot, but it gets super hard finding the bugs as I tend to play it in a certain way even if I try to do things "out of order". Other people just click on things at different points of the game than I would, so a lot of stuff goes unnoticed by me until people report them. Luckily people report bugs pretty often on Discord or forums. But yeah, I get that it's frustrating to run into a ton of bug and tbh I would've probably also quit on a game after running into so many.
I only hope your experience is not the average experience since there are no people flooding my Discord with bug reports 😅 feel free to check up on the game in the future - it might get better. It might not, but I'm forever an optimist.