I've been behind him because I like the overall progress of his transfers, but I've been miffed by his lack of good wide forward and full back signings and was willing to give him this summer (and the previous Jan) to rectify. We've signed no one for our RW, and a relatively unknown player for our full back.
I'm sorry, but the shit football we'll play this season is on him. We could've signed Mahrez this season and it would've been a huge upgrade to out attack. But we didn't. Sanchez and Lingard as a pair aren't good enough as wide players for a top team, neither are Young and Valencia. I think Mourinho's taken us as far as he can and we should look for someone with better ideas, which I think will happen at the end of this season at the very latest with an early dismissal not surprising.