Managers will get spells like that. It’s been so tight and solid for so long and now we have some new players coming through (Winks, Sanchez, Aurier), some possibily past their best (Dembele) and others maybe looking at leaving or a bigger contract (Rose, Toby, Alli).
We also have the stadium issue which, in terms of short term results, is a factor.
He needs a chance to manage that and not have people knee jerk. Everyone talks about Fergie at the start of his reign but around 04-05, they were struggling badly with Chelsea being doped, Jose coming in, Keane and Van Nistlerooy getting on, Arsenal going unbeaten, finishing 3rd or 4th and going out of the CL in the group stage. I know United fans who were writing him off at that point. Yet they came back.