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.
The Europa League is a very long and hard competition and any team that eventually wins that competition deserves it.
Realistically, penalties are always a lottery, but this time I somehow had the feeling that Sevilla players were more prepared and concentrated than Roma players for penalties.
The Roma players were too focused on the refereeing and other things that have no direct connection with the match, so they actually lost their concentration and calm before the penalty shootout.
Sevilla have won all 7 of their Europa League finals which is an incredible record and they should be congratulated.