I don't care about supposedly and what ifs. That's the type of stuff you write about 20 years in the future when you're reminiscing about the past and what could have been. I don't care about his performances for the National team if at the end of the day, he can't perform for Manchester United on the pitch. I can only go off what I've seen and what I've seen is not good enough. People keep thinking he'll get his head out of his ass, he's playing with nerves. News flash, that's 50% of what constitutes a pro player. The mental aspect is just as important as the rest.
I'd be super happy if he starts playing well and proves me wrong, but being a logical man insofar that I can only judge a player on his recent form and performances, his presence on the field has been detrimental to the team and the team is above everything else.
On the issue of selling after one season, the Di Maria case has set a precedent which I find hard to argue against. If it's not gonna happen, it's not gonna happen. Sometimes, it's a bad fit.
With regards to the comparisons with Tuanzebe, I simply cannot accept that any man who has watched United since last season could ever argue which of the two has come out looking the best. It doesn't hurt that he is a product of the club's youth system , a very, very, very, very important part of United's culture.