Sevilla's performance this season is quite bad in all the competitions they play so I think it's quite normal for what they experienced in the UCL this season, they really don't deserve to get through the group phase and what I regret is that Sevilla didn't learn from last season when They had a pretty bad performance, but they got an advantage or luck when they managed to win the Europa League.
For at least two seasons, Sevilla has been a pretty bad team, especially in Laliga, because last season their bad performance in the league was somewhat covered up because they managed to become European league champions, while the Champions League doesn't seem like a suitable competition for the Sevilla team, which actually performed very well in the European league.
Financial problems seem to have really damaged this club because even at the end of last season they offered all their main players in the transfer market to save the club's finances so it is quite understandable if they performed poorly this season in all competitions because it is not easy to be an outstanding club with financial problems because Usually clubs will actually use money to make their team perform better, whereas Sevilla is the opposite.