I see some of them as selfish players who refused to bring down their ego to help the club improve, the both in that photo have lots of pride and if they take it to their future club I don't think they'll develop into the quality of players they're supposed to be especially Garnacho.
The club no longer need those players and they are free to request for chances of leaving. The fact is they did not perform well for Manchester United, so you must think oppositely like if those players want to stay, will Manchester United want to keep them in Old Trafford. It's likely no, and main barriers are very high salary of those players, so it's big hindrance for any club that want to buy those players from Manchester United.
Okay, 5 players (Rasford, Antony, Garnacho, Sancho and Malacia) of Manchester United asked to leave. This is such a good news for MU because they don't need to put more effort in order to sell them. However, this news is so late. This should happen like two years ago in order to minimize their financial lose.
They have to accept the financial lose from selling them all, then focus on how to rebuild the club back from the scratch.
They did not perform well in Manchester United and did not satisfy the club, so why do we care about their request for putting them on transfer market. Manchester United is a big club and they only need players who want to play and contribute best for them in coming seasons. They put belief on Ruben Amorim and can take advantage of those player request to give Ruben a great chance of changing and improving their squad and substitution resources entirely in this summer.