inconsistent launch failure

so while i've seen a lot of posts here about the game not launching, but i can't find anyone else experiencing inconsistency with it

so its probably my cc (i removed all my mods) since the game launches without cc, but i can't test what cc is the problem because ill gradually add it back, encounter the failure, then remove the cc id just added, and it still fails? also my game was working fine before the update, and when i started the game after it auto updated, i removed the whole mods folder beforehand. after the patch, i tried to launch the game with just my cc in the folder, nothing new, just all the same stuff that worked a couple days before, and thats when it started

i started doing things like deleting cache & last crash files and repairing the game every time i started the game, and it was fine, but then it became inconsistent again. also, sometimes if i start the game from the ea app, it fails, and then i try again from steam, and it works. sometimes it only works vice versa. sometimes nothing works, again even with the same mods folder. ive also tried starting with a whole new sims 4 documents folder, and ive also unistalled and reinstalled the whole game

ive had launch failures before and just been able to find and remove the dodgy package file. whats driving me insane is the inconsistency with this