The results have been poor
At the end of the day, football is a results business, and despite his brilliant time as interim manager where he won 14 of his 17 games in charge, the results since he became permanent manager have been extremely poor, winning only 11 of 31. It’s difficult to comprehend why United’s form went so downhill since Solskjaer was appointed, but there’s no hiding from the results.
He isn’t a proven manager
As well as the poor results, one key reason why some United fans aren’t prepared to give Solskjaer more time and give him an opportunity to improve his form at United is because he isn’t a proven manager. Apart from a couple of spells at Norwegian club Molde and a short time at Cardiff City where the club were relegated, Solskjaer doesn’t have any other experience as a first division manager. The majority of United fans understand that it will take time for the club to get back to competing for trophies, but they believe that a more experienced manager should be brought in and given time to rebuild the club. Since being relieved of his duties at Tottenham, Mauricio Pochettino has been heavily linked to replace Soslkjaer, and despite the fact that Pochettino didn’t win any trophies during his time at Tottenham, it can’t be ignored the vast improvement Tottenham have undergone thanks to Pochettino, such as consistently qualifying for the Champions League and reaching the Champions League final. Another name that has been linked to the United job is former AC Milan and Juventus manager Massimiliano Alegri who has been out of a job since he was replaced by Maurico Sarri in Turin at the end of last season. Allegri is as qualified as it comes regarding managers as he has won: 6 Serie A titles, 4 Coppa Italias and 3 Supercoppa Italianas, so if you’re going to be patient with a manager and give them time, it would make sense for it to be a manager who has won trophies.
As a personal opinion, Solskjaer doesn’t look like the man who can get United back to challenging for trophies, however, he is the best candidate to take United through this squad rebuild as he is willing to get rid of players who aren’t good enough and brings in players that are a good fit for his squad rather than bringing in big names.