Ancelotti was past - it at everton before he won with real madrid, that media narrative can easily change when a manager win something worthy, whether the reader have their own brain to think by themselves without following what media wrote is different matters
Klopp and conte meanwhile, seems like a past-it manager
Klopp, unlike Mourinho, his club actually back him with signing, he spend 200m this season but almost , if not already out of all competition , lingering in midtable
Conte , like you said , clearly the owners of the biggest club agree that he is past-it , if not he wouldn't be at spurs
And one more ,poch ,this guy also clearly past - it , he won a title that even i would be called shameless to brag about and is now jobless , no big club comes calling
Those are the exact definition of past-it manager according to people , it's just that they have a lot of friends in media so nobody wrote about it yet