This is not the first time things of this nature has been reported. There was multiple reports that Messi didn't want to pass Ibra the ball, and truth be told you could see that on the pitch. Furthermore, Apparently Messi sent a text to Guardiola saying "I can see i'm not needed anymore".
Like, I said it makes sense. You know what doesn't make sense? That an intelligent coach buys a complete player for almost 70 million, lets him play his game for the first six months, in which Barca broke a points record, and then all of a sudden asks him to play like a normal striker, severaly minimizing his impact. He'd have to be a moron to either buy Ibra and know nothing about him, which is very unlikely, or an idiot to make him switch his style of play midseason unless he had a very good reason for it. You don't do that, especially not to one of your most consistent and productive players, and definitly not to someone who cost 70 million euro.
I guess you could argue Barcelona played better without Ibra, because there was more trashings but fact of the matter is everytime he got subbed off Barca played worse, and everytime he got subbed on you played better, with the exception of second leg against Inter.
This just makes sense to me. However, we can just agree to disagree. Who knows what really happened. Doesn't matter now anyway. Barca moved on, and Ibra moved on. And that's that.