Sevilla is the luckiest team I saw and they didn't have good players or even a good coach this season, also in most of the games, Sevilla couldn't even have a good performance and the only reason for them to win this title was using the mistakes other teams had and they also had enough luck to win the hardest games against strongest teams like Manchester United in this season.
That's why I can blame Roma and Mourinho for anything when they lost the game against Sevilla.
Yes, the side of luck and the side of experience are the things that have led Sevilla to become the most successful team in the European league this season. Sevilla really don't have good players in their squad because none of their players have stood out enough for their performance in Laliga this season. However I think they have a great coach who is able to make them rise from their slump this season he is José Luis Mendilibar.
since José Luis Mendilibar he appointed as Sevilla coach in the second half of this season he immediately made a difference for Sevilla, especially in Laliga because he managed to bring Sevilla out of the relegation zone and he also successfully brought Sevilla to win the Europa League. I think he deserves to be considered a great coach this season.