IMHO and very TL;DR: same reason why Agile failed. Just like Agile, OOP has some good ideas at the core, but "Big Enterprise" ruined it by starting the (from todays point-of-view, unbelievable) big OOP-hype in the 90s (OOP was basically the Machine Learning / Blockchain of the late 90's, just worse because it infected absolutely every last corner of software development, everything had to be OOP, from programming languages, to application architecture, to operating systems, to CPUs...)
Thankfully people started to look behind the curtain and noticed that the whole "industrial-scale ceremony" that was built around the few good OOP ideas actually hinders software development, so they took the few good pieces and integrated them into the new languages we're starting to see now.
20 years late, but better late than never :)
(PS: watch the same cycle unfold around functional languages in the next 20 years)
Thankfully people started to look behind the curtain and noticed that the whole "industrial-scale ceremony" that was built around the few good OOP ideas actually hinders software development, so they took the few good pieces and integrated them into the new languages we're starting to see now.
20 years late, but better late than never :)
(PS: watch the same cycle unfold around functional languages in the next 20 years)