He burdened us with multiple players that would never have been in United in the first place. In fact, if it wasn't for the board not backing him in his final window, we'd also be without Martial and have more ageing, injury prone has-been's in defense. He damaged player relations so much that he destroyed the possibility of our best player extending his contract...no, our two best players (one of which has had to be appeased with ludicrous wages).
It's what Jose does. Moyes was just shit, but he wasn't here long enough to do any bad damage. LVG was boring and transfers were poor, but it was easily remedied, and he did provide us with some players who done the job here.