I don't crash much early game. After turn 150~ I average crash every 30 turns for no noticeable reason. I've never been able to complete a large game past 250~ or so turns, I usually get weird things like every-time I try and fight with a certain ship in a certain place, the game will crash. Or every time I invade a certain planet, the game will crash. I push past these problems with redundant saving and re-loading to avoid the incidents that causes the crash, but I eventually get check-mated where I have a ship, that when attacked, crashes the game, and it runs out of moves beside an enemy, and I haven't saved in an hour. Or I will hit end turn, it will over-write an autosave, then crash for an unknown reason each time I reload it.
I crash for so many different reasons that are replicatable or avoidable with reloads that I don't even know where to start with sending in a ticket. Although I have two games I would quite like to be able to finish and can't.