The major culprit responsible for the circus around Pogba is the media. They had labelled him as a flop at the moment he returned, even before he played his debut. They were too desperate to make a big fuss over his pricetag and they certainly couldn't afford to change their viewpoints and admit mistakes. They have an agenda to bring Pogba down whenever possible. That's why they pick his flaws when he's having a bad day, or attack his hairstyle when he's playing well.
This also applies to the so-called war between Mourinho and Pogba. We were not Mourinho nor Pogba and we wouldn't know what was actually going on. People basically judged only on what the media had presented to us (which was clearly biased), and that's why they had a gripe. From what I saw, Mourinho chose to stick with Pogba at that time, despite his reputation for dropping and getting rid of disobedient players. He didn't actively put him on the transfer list either. Therefore, I highly doubted whether their relationship was as bad as the media described. In my opinion, the media exaggerated the incident and were largely responsible for the circus.