The roots of the current tension between Pep and some fans lies in the aftermath of the CL final. I expected the tension and sort of predicted it after the CL final after I saw the negative over reaction to Pep. One of the most successful seasons in club's history ended with a huge wave of criticisms of the manager. Pep probably knows about the consensus among City fans that his tactics in Porto was "stupid","idiotic", "colossal fuck-up", etc. And he most certainly finds this consensus baffling and irrational. So, I'm not surprised in the slightest of what's happening now. Expecting the tension, I wrote back in June that he might leave already after this season. You can see my post in his 20/21 thread.
Now, I've changed my opinion because I think Grealish will help us perform better than expected. I think we'll break goal-scoring records even though we have no proper striker! Some fans may continue to push the self-destruct button, but Pep won't probably pay much attention to them anyway. I hope so.