Probably said multiple times, but EVERY job Ange has had, the fans complained about the same stuff going back to his Brisbane Roar days & it ALWAYS got worked out & was successful.And yet somethings stay the same. Yes set pieces have been worked on been saying the same for weeks, but the absolute principles stay the same, and that is where most of us have our concerns. Very very few are suggesting replacing him and the vast majority will give him time as long as we continue to see area's of improvement. In fact the only "narrative" I can see right now is the one you are painting that the fans are slowly turning on him, it's a very small number regardless of how vocal they are. Don't confuse valid criticism with turning on him, or actively wanting him to be replaced.
I personally don't even see the point of having "concerns" right now. I know Ange knows what he is doing, so I trust that he will sort them out in due time, somehow I think a premier league coach probably knows/sees more than what I/we do in here.
We also aren't competing right now for anything (maybe a cup). We are playing good football this season & by & large I have enjoyed that a lot even if I am annoyed after losing. Im looking 2-3 seasons down the line, when these young guys have matured & developed, pep is hopefully gone, maybe the arsenal cycle is over & our current crop of players are entering a new phase where they could start pushing for a title.
This is all just how I feel, I hope Ange is here for a long time & we give him time & patience (& eventual backing) like Arteta. I would still want us to keep Ange if we finished 10th this season. Im sick of the manager chopping & love how we play currently.