I'm sorry to hear about such broken experience! D: I have not heard before that bashing the doors or using the book of enlightenment would cause crashes. That sounds really alarming actually! Could you specify which doors caused this if it's not too much to ask? The game is buggy, that much is obvious, but I was under the impression that most of the game breaking bugs were starting to get weeded out.
As for the saving system. The first half of the game is really just roguelike survival, which is the reason saving is also very limited. I also kinda wanted to encourage starting the game over and over and trying different things, instead of trying force through the game with a single playthrough. After the first half, the game starts to give you more chances to save in both books and free save beds. Of course I can understand that the game crashing really takes away from the experience and I'm working on fixing things the best I can.