We don't know about Pogba's condition. Nor Bailly's condition. Nor Rashford's.
Had Jose' wanted to pursue the top 4, he would have played them.
They were on the bench, so they were available for selection.
If they were over-fatigued, it's mostly Mourinho's fault, as he didn't make turnover when needed, in some games which were less significant and less decisive.
However, as we've mentioned before, it was obvious that Mourinho decided to drop out of the race for top 4 after the draw with Swansea and after the away win against Celta.
For me, it was a wrong thing to do as there were still decent chances of finishing top 4, while the EL trophy is not in our cabinet yet.
Therefore, deciding to make a massive turnover against Arsenal might leave us empty-handed, so I'd say Mourinho is gambling a lot here.
Now, he is walking a tightrope because of this situation and not only him, but the whole club. We all know the importance of playing in Champions League, so you can imagine the consequences if we don't win the Europa League.
Concerning Mourinho's public criticizing of some players, I understand that not every human being is the same and therefore players react in a different way. While a public bashing might push someone to do more, it might have a negative effect on another person. As a manager, you must know the soul of your players in order to choose correctly and make your man-management successful. In this case, I think Mourinho got carried away and exaggerated a bit. He feels a lot of pressure, imo he expected the things to be a tad easier and once the results were not as good as expected, he started to blame everyone around: players, referees, fixtures, luck, brexit, Margaret Thatcher... :)
I might agree with him in some cases, but I think a big part of the responsibility goes to himself as well, as at the end he is the leader, the person to decide who to buy/sell, who to play, which formation to choose etc.
Let's wait and see how this ends, as there is still the last straw called Europa League.
If we win it, this season might even be remembered as successful from a certain time distance, because of two trophies and a CL qualification.
I really hope it won't go the other way...