Mourinho regularly called Shaw’s performances into question and hang him out to dry several times before his departure as Manchester United manager in December 2018.
Shaw joined the Red Devils from Southampton in the summer of 2014 but was hampered by a number of fitness issues early on.
The 25-year-old has become a key player for Ole Gunnar Solskjaer in the last two seasons and is now the club’s undisputed number one left back despite the summer arrival of Alex Telles.
'Luke Shaw when he came to United from Southampton was a fantastic player, but he fell away a bit', Wright said on the BBC.
'He had injuries and lost form, but he has turned it around. He is fitter, stronger and is showing what he is capable of.
'Some of the treatment he got from Jose Mourinho was degrading - I didn't like to see it.'
Shaw has made 27 appearances in all competitions for Manchester United this season.
Shaw was part of the United side that won the Europa League in the 2016/2017 season.
