We can't judge Sevilla about their place in La Liga because they didn't focus on the league games and they didn't need the La Liga games to earn points at all in the last games because they couldn't reach the top of the table and on the other hand, Sevilla wanted to win the Europa League and they have enough hope for it because of the last wins the had in Europa League.
In the end this is true and Real Madrid was trying the same. They wanted to make the La Liga season be forgotten by the win of the Champions League title and it would have worked. Nobody would be talking about their inferior performance compared to Barcelona had they won the Champions League. Of course everyone knows that Sevilla didn't perform well in La Liga, but of what help is that to Manchester United and Juventus Turin?
Both of those clubs saw that Sevilla is struggling in La Liga, but that had obviously no influence on the game against Sevilla in the Europa League. Even when sometimes it is hard to understand, it is still two different competitions and it seems that a team can show two different performances.
In the 2022/23 season, Manchester City won the UEFA Champions League trophy and Sevilla won the UEFA Europa League. A team from the English Premier League over La Liga but sadly no team from the Italian league could win a major tournament this season.
Although three different teams from the Italian club qualified as finalists in three different tournaments, unfortunately none of the three teams managed to win the trophy.
Fiorentina, Roma, and Inter Milan all performed well in the finals, but luck was not in favor of any team, so these three teams eventually exited the season as runners-up.
Yes to some degree it was the lack of luck and to some degree lots of people make the mistake and compare the positions in the table across different leagues, which is wrong in my opinion. Achieving equal ranks in the Premier League and in Serie A is still worth a bit more in the Premier League as it is the much harder league to play. In terms of Sevilla vs. Roma it was an equal game and that was indeed a bit unlucky for Roma, but overall still a deserved win for Sevilla.
You are right the Sevilla team has not focused specifically on LaLiga for the Europa League. But in my personal opinion, Sevilla need to do great in La Liga too, because there are enough opportunities in this league. With nothing more likely to be done in La Liga this time around, it's only fitting that Sevilla do something great in the Europa League.
Along with the English league, the Spanish league is the best European league, with a lot of quality teams and players.
Even for Real, it has been very difficult to win the Spanish league in recent years, but that is why they have won many more European championship titles than Spanish championship titles.
On the example of Real, it seems that it is easier to be the champion of Europe than the champion of Spain
The situation is similar with Sevilla, they are much more successful in European club competitions than in the Spanish league.
In European club competitions, it is enough to play 6-8 quality matches to win a trophy, but in the league system it is not enough and you have to play at a high level continuously.