Still very and unsportsmanlike that Mourniho decided to throw away his medal. Would he have picked it up afterwards? That lucky finder could become rich at an auction. But maybe that's typical for Mourinho, he just wants to win and is no longer satisfied with 2nd places. In competition it is a different story. He will be especially disappointed that he is not allowed to play CL with AS Roma now, because in the competition they have only qualified for the El or maybe even COnference kleague. A big difference.
The European League final match had several controversial refereeing decisions so it was only natural that Mourinho and/or other AS Roma players could not accept the final result of the match. But yes, if we put this case aside, as a team and/or player and also a professional coach, then they should be able to accept whatever result has been decided. Even though later there is still something to be debated about, but for such an award, they should be able to accept it even if only by force.