Hes been failed by previous coaches who A. Never developed his right foot. B. Told him to be a winger in the pl you need to be quick and be able to beat a man. Should have been converted to a full back when he was in his teens
Too slow to be a modern day full back and at some stage in your life you've got to take ownership and say to yourself "maybe I should work on using my right foot".
Hes simply just a bang average footballer whose made an absolute killing income wise by carving a PL career for himself from the massively limited skillset he has.