It could be from removing mods then, that can subtly corrupt savefiles over time. You can add new ones but anything removed is likely going to cause escalating errors until it breaks completely.
But yeah I don't want to fuck with it anymore, I've got a list of mods ready for a new pack when B42 goes stable. Should be able to get a shorter multiplayer campaign going with insurgents, week 1, bandits and an extraction quest. Then I'll work on a more shitposty sandbox pack where we can just fuck around again after the other modders have caught up if they're going to.

