Other's words say it better than mine. The below is just one misinterpretation. Another common and related one is as a justification and excuses for male toxicity. It does describe contributing factors for male toxicity but neither advicates for nor excuses it, it's actually a satire of it but, hey, some people think Starship Troopers is just an action flick about killing alien bugs.

From an article in Medoium on the topic:

What was intended to be a satirical representation of toxic masculinity and consumerist disillusionment has, very ironically, become the guide for the ideology it meant to criticize. Despite Tyler Durden, played by Brad Pitt, acting as a symbol for the critique of misplaced aggression and rebellion, male audiences have misinterpreted the character as an exemplary figure for dominance and chaos.

Director David Fincher has stated numerous times that the film was not meant to glorify violence but instead critique how consumerist culture has pushed men to extremist and destructive ideologies because they feel powerless and emasculated in a world that does not require aggression to survive. In an interview with Film Comment Magazine, he remarked:

“We’re designed to be hunters, and we’re in a society of shopping. There’s nothing to kill anymore, there’s nothing to fight, nothing to overcome, nothing to explore. In that societal emasculation, this everyman is created.”

https://medium.com/@anapilar.manzanares/when-satire-becomes-aspiration-the-misinterpretation-of-fight-club-cb7c5b86c8ea

I am Jack's oblivious centorm