This one is like the dumpster fire behind the abortion clinic. So may issues make it unplayable.
The Tower quest is so bugged that you can't make it through without cheating and it gets worse from there.
Can't access your room in the tower have to fight 3 battles to get there every morning, Erevi disappears after she gets pregnant and you capture the rats and therefore the Boar Hunter Quest never triggers.
Games like this convinced me stop being a Paetron.
What nonsense!
This is one of the most stable games I've played, personally I cheat but that because I hate the RPGM combat system, but plenty of others don't.
Almost all the "bugs" I've seen reported here happen because players do something silly in save editor like add quest items.
Erevi doesn't disappear, she goes to her bedroom. I have no idea what you're talking about with the rats, AFAIK the rats have nothing to do with the boar hunter quest.
If you are having issues with this game maybe try asking nicely for help instead of ranting, there are some pretty helpful regulars who hang out here