That is partly untrue.
First stint at Chelsea, he had a fall-off with Abramovich, not the players, and those players were one slip away from winning the Champions League that season.
Inter, left like a legend and loved by all of them.
Real, got to 100 points against one of, if not, the best team of all time, and laid the foundations for the Real Madrid that would conquer Europe in 4 out of 5 years (Ancelotti and Zidane had nothing to do with the recruiting of the players, that was all done by Mourinho. That Real generation was built by Mourinho, Zidane and Ancelotti just enjoyed the benefits).
Second stint at Chelsea, finished 3rd in the first season, won the League the following year, and was thrown under the bus by the players, of which most of them have declared publically that they fucked up with Mourinho and if they had the chance they wouldn't have done what they did. The next year, they won the League with Conte.
Man United, too early to say, but it's looking like he took the bullet instead of some other people at that club, let alone the fact that that squad is filled with some spineless snakes.
Apart from United, which are an absolute shambles administratively, in all of the other cases, Mourinho either has achieved the best things he could with his teams (Porto, Inter), or has laid the foundations for a successful future. He's a cunt, but, as I said in my previous post, he might just be what we need at this point, and there is no doubt that he also needs us.