I don't disagree with any of that and I was cautiously optimistic after Emery's first season, seemed liked a fairly reasonable starting point to build on. There was some improvement from the previous one. But this year it's all gone to shit and you can't sensibly blame the dude who was 2 managers ago and hasn't been manager for 2 years.
Well, apparently you can, but you shouldn't.
But anyway, Arteta can clearly see where the problems are. Whether he can do anything about them...well, we'll have to see.