Was Ross playing at Valencia about ten years ago then mate?
If not - what on earth does it have to do with anything really, greatest ever manager in the game fell out with players in Ferguson - and ones who couldn't put up eventually moved on - including players a level above what Barkley is at.
Mourinho lost an entire dressing room last season - of a team he actually put together as well.
As for his time at Valencia - he took over a team that had not won any trophy the past 4 seasons and won them the cup, since that win, they have gone ten seasons without winning anything.
so Maybe he was right to try to overhaul the squad in reflection, what goes without question is that he has learned from that time, just see the way he has handled basically replacing most of the starting 11 without any significant fallout in the dressing room