This is the result of lack of football style which Mourinho has.
In the past his abilities were to create a solid group and take advantage from than have excellent tactical abilities like other top managers. His Inter, his Porto, his Chelsea during the first and the second period, were team with a strong mentality and simple football concepts good enough to beat the opponents and won many trophies.
How many current players would be good enough to be into the XI of Inter or Chelsea? Ibrahimovic for sure, Carrick for sure, De Gea for sure, but for the rest? To be talented is not connected to be a winner. Paul Pogba is the perfect example.