Yes there are spoilers. It is a 25 year old movie. I watched the FX tv version so it cut out the f words and any nudity. Still plenty of violence and unseen ( but heard) sex scenes.
I really did not see it coming that he was schizophrenic the whole time. Looking back, there were some tells. But I didn’t catch them. I did figure the Brad Pitt guy burned the apartment down early on.
You do have to suspend belief that all these guys will blindly follow Project Mayhem once it gets really crazy, but that’s fine. I get it’s just part of the movie. Also the very end with him shooting himself, surviving, and all the buildings still blowing up. Crazy stuff.