i think the biggest problem is the save system. crashes and bugs can be dealt with, but having to replay 10-30 minutes because the game doesnt understand how to load a save is a massive problem.
if i had to guess, the coder tried to reinvent the wheel with the menu system and ended up breaking something important.
this is kind of why i tell people to do small batches instead of massive chapters each time. its much easier to fix a small bug than trying to even find what bug is even happening in the first place!
Now, i fear the backlash might kill the project, it wouldnt be the first, i just hope they take a deep breath and try to fix things up before working on the next one. however, if im being honest, the list of borked stuff is too big, i dont think its even possible to fix that much in a week, probably going to take the whole month... if they dont give up(which i hope they dont).