Allegations against Leto have been documented as far back as 2005 when a report in the New York Post alleged that Leto texted teenagers and seemed to have an attraction to younger girls. In a now-deleted message board, multiple women posted that Leto took advantage of them when they were underage.

James Gunn has confirmed he has seen Leto gravitate to underage girls and flirt with them

https://movieweb.com/jared-leto-cult-true-crime/

He has a cult, though this one seems a bit like cringey publicity stunt tbh.

Aside from that, his general shit baggery, like sending used condoms and live rats to costars just to be edgy. He’s 53 and behaves like an edgy teen