Maybe Manchester United really has to change the team on a large scale and start again from zero. Because what I see at the moment is that the Manchester United squad doesn't seem to have good chemistry or chemistry anymore.
Changing the team drastically? Isn't that too much? The club has to spend a lot of money to recruit players and they also need to sell some players if they want to change everything, but I don't think that's a good idea. The club only needs to recruit a few players who really need to be fixed. Amorim needs to sort out the players who are suitable according to him and the players who are not suitable can be removed or loaned to other clubs so that he can build a team that suits what he wants.
I believe that replacing the entire team is too much for the team, and Amorim will have a difficult time improving the new squad for the club. Manchester United will spend a lot of money if they sell all of their present players and acquire new ones. They just need to do what you suggested: sell a few players who aren't contributing to the team or loan them out for the season. If Manchester United had to change all of its players, I doubt any of them would remain, except for Amad and the new players they signed this season; the others are in poor form.
However, Chelsea replaced the entire squad, we watched how they suffered in the previous two seasons, and a lot of money was spent before purchasing the players. Many people will believe that Manchester United must sell their players in order to perform like Chelsea, but Chelsea, who are currently second in the Premier League, have not achieved this in a single season. I believe that this is why some people are not impressed with Chelsea's performance because they have spent a lot of money on players. If they don't want to make Amorim's job too tough, they should just sell a few players.