Of course they haven’t complained; they’re all bound by compromise agreements and don’t want to endanger their huge payoffs.There's not a single bit of credible information that says otherwise, none of the former managers, not even Mourinho, has complained about it.
So why did they buy players who were manifestly unsuited to their styles of football (Moyes: Mata; Mourinho: Mkhitaryan)? Was it simply because they were idiots? Or because they weren’t their choice?
I’m not excluding the possibility that they were idiots by the way.