Thats a bit of an overreaction...
If he was sacked now and we brought someone in who salvaged 4th place, it could be a good thing he was here. We wouldn't have got Mata if we weren't so shit this season, Rooney might have been gone last summer if Moyes didn't make him stay and a few other things like Januzaj. We weren't going to win the title this season regardless, and after Fergie it was always likely that the first manager would struggle, and it was more likely (to me at least) that the second manager after Fergie would be successful. So in a way, we bring in Moyes to be shit for half a year, sign Mata and then get rid of him and then we recover and save 4th place and are right back amongst it next season
Plausible scenario right?