That's probably true of his 2nd season. The first 6 months he was great, and his crossing was unbelievable - 2nd most assists in a season when everyone else had a half season head start tells me there's a decent player in there somewhere.
He went to Euro 2016 and then didn't get a proper pre-season for the 16/17 season, I've always suspected that missing those few weeks of pre-season killed his form and he never got it back.