Mourinho was not guilty at all in that game against Sevilla.
If you check the other games Sevilla had in this season you can easily understand Sevilla was lucky most of the time because they usually played against strong teams when they were not ready for it or when they didn't have some players.
For example, I think if Dybala could play for Roma, there was a chance to see another result.
Man, i do agree with you about sevilla was the luckiest club in the europa league this season. It was always getting its goal from own goal by its opponent even when sevilla was facing juventus as well. I didn't even know where the fuck this kind of magic was coming from but what the fuck was wrong with this club this season? It seems like that all of luck were owner by sevilla at this moment. Dybala already played for roma since the beginning of game. You shall watch again what lineup that used by mourinho since the game was starting.
The problem was if mourinho was changing him. Mou should have played him for full time instead of changing him before the end of game.