This 18 months/we can't keep going round in circles stuff is overblown for me. That's basically what every other club does. That's football. Right or wrong.
If you're not doing it, you get a couple of years. If you come in and get something going you might last four or five like Poch or Redknapp. Beyond that you have outliers, or uber top tier guys like Klopp and Pep.
Ange has had it pretty good off the fans till now, mainly because 18 months ago there was a lot of "what I'd give for attacking football", sentiments to back a manager, and ire directed at Levy. So it's become a binary choice. Then there was that infamous 10 game spell, the good vibes, that fucking Robbie Williams song, and the cult established. It's all protected him for longer than most guys would have got.
He isn't hamstrung that much to be bottom half at Xmas. It doesn't matter if we have zero or fifteen players out injured, coz whatever team he has selected in the last year has been inconsistent in performance and results and he is no closer to being able to capture and sustain the good stuff. He's got to sort it out pronto, or he can have no complaints about getting the inevitable bullet.