Manchester United is not going to have a good season. This is definitely not a manager's fault. They have been doing some mistakes on transfer market over past few years. It doesn't matter if Ole remains, or Pochettino arrives. Even Sir Alex Ferguson had some shitty first seasons when he took over Man utd in the 80-ies. Key is consistency, whoever will manage Man UTD he needs time, at least few seasons before good results start to kick in. The club has money, reputation, fans all over the world...they just need a manager who will stay long enough to make a result, and then results will come, and they'll fight for every trophy.