What do you mean harsh, on who? He's not picking himself to start, Mourinho is. If someone is good enough to threaten his position then that person should take his place, but it's not likely that's gonna happen until he leaves, given he continues to perform. The only problem I can see is the fact that we have to accomodate him with players around him that suit his style. But then again, he's our best player so we have to play to our strengths.First of all, its not as I'm saying I'm 100% sure this will happen. But there is a risk in my opinion some young players won't be able to flourish if Zlatan stays too long. He has got a big personality and takes a lot of room. And he can pretty harsh if someone threatens his position. That's how he works. For me, it comes down to how good he is. He is not a Roy Keane that can be an OK player but still lift the team with his mentality and presence on the pitch. He need to be number one.
Adrien Rabiot, Douglas Costa is examples of young players Zlatan has had problems with. Cavani is another example of a player that wasn't able to be as good as he could be with Zlatan in the team. In that case it's mostly because they play in the same position. Zlatan himself couldn't be the best he could be when playing with Barca with Messi in the team, because he couldn't express his personality and game like he wanted to. That's how it works. You have to let people express their game and personalities to flourish. If a young player have a big ego you have to let him express that. Zlatan wouldn't in my opinion.
Zlatan get along with nice players because they nicely let him be number one but if there come another ego that threatens his position there will be problems. Zlatan wouldn't come along with another young Zlatan for example.
I just have to say I like Ibra and I understand why he is like he is. He is, for me, one of three best players the world have seen the last decade. But I'm just being honest. The moment he becomes number two in the hierarchy it's time to let him go and let other players take room and place on and outside the pitch.
Cavani was the inferior player, no way he should ever have taken Ibra's place. When you have Zlatan in your team, you have to let him be the main man, and I agree, for that reason some players that don't suit the way he plays will be held back. I don't even know why Barca bought him if they were gonna use him like they did. But that's all down to Pep's inflexiblity as a manager.
If another ego comes along, that's down to Mourinho to sort it out. And if someone better comes along, he shouldn't be the main man anymore, but that's not likely to happen in the time he will be here.
In terms of being a leader you can ask his former teammates and all the great managers he played for if he is or not.