I think it doesn't have anything to do with luck that Sevilla won the Europa League title. Actually yes at first they looked really lucky in some matches. Because they weren't still able to improve their performance due to having a bad season. Their luck helped them until the end of the first leg against Manchester United. But as of the second leg we have started to watch a really different Sevilla. They finally started to play as they should and we started watching the usual Sevilla again.
As of that date Sevilla deserved to eliminate every single one of their opponents remaining in the tournament. In the finale they deserved it again because of showing a great performance at using penalties. They become something different when it comes to the Europa League even if they perform badly in the La Liga.
Sevilla are the best side when it comes to the Europa League
This is nothing to have much talks about if they are not then they shouldn't have won the finals
The refree made some one sided officiating but still Sevilla was not a bad side that night
Apart from the polemic on the field, Sevilla did not play badly but if the referee was more competent in making decisions then the result would be different. It seems that Sevilla's luck has no end after this season they managed to get rid of strong opponents and they advanced to the European league finals as well as getting their 7th title in this competition. Maybe Sevilla can't just rely on luck forever and they have to work even harder to prove that they are the best entrants in the European leagues. I think in the summer Sevilla should bring in new players to strengthen their squad for next season so they can compete more openly.