I think if you were to look at footage of some of the best ever managers in the history of the game on the training ground (Ferguson, Clough etc) then you might feel a little uncomfortable about it. Yes times have changed blah blah blah but professional sport is still completely different to the real world. You've watched a 30 second clip with no knowledge of the context, what's happened previously, whether this situation had happened before etc etc and have made your mind up. I guess that is the modern world though, unfortunately.Ah yes my bad. Bullying is fine if it is in professional sport.
Even in the context of that clip, Kompany singles out one player, screams in his face, confronts him, and then when he asks why he's being picked on, the best he can come up with is "body language".
Sure, something might have led to this confrontation and it is a lone clip that doesn't provide a ton of context, but do you really think behaviour like that is ever acceptable from a manager in any workplace?