Olympiakos had their worst European season in their recent history ... . I don't know exactly the situation of the club but they are not doing well in Super League of Greece as well so I'm thinking they are in full reconstruction mode ? because they dominated Super League for so many years and lately both AEK and Panathinaikos are looking stronger and already contesting for 1st place.
I can't say Olympiacos are having their worst season this season in the Europa League, because even though Olympiacos can qualify for the next round, the reality is that Olympiacos can never go further.
Also, regarding their competition in the local league I think there is no problem too because everything is still running normally. Even though Olympiacos is a team that dominates their local league but sometimes they get poor results, and that is natural and it can also be seen that their dominance can still be broken even though it will take a long time for their rival teams to break Olympiacos' dominance in the local league.
Anyway, a team that can dominate the local league doesn't guarantee they will do well in the European tournament, just look at what happened with Celtic and even Bayern Munich. both teams are dominating their respective leagues, but the good results they got in the local league they can't achieve in European tournaments and that seems like something that often happens too.
Another disappointment would be Dynamo Kiev as they only got 1 point and finished last in their group
Dynamo Kiev this season does seem to be a difficult season for them, because the safety factor in their country may also be one of the causes of their declining performance this season and even Dynamo Kiev's local league slipped to the middle of the standings.
But I'm not disappointed with them because of several factors that happened, so it's certainly not easy for Dynamo Kiev to recover quickly.
and we can say this about Lazio as well as I can't believe they didn't win Group F but gladly they took 3rd place and moving straight to Conference League
Also about Lazio they actually won on their last matchday yesterday but unfortunately, Lazio still lost in goal productivity so Lazio were not lucky enough to win the group.
Because even, this group until the end of the group stage still have the same points and it is something very tough competition in Group F because they only differ about the total goals and this happens very rarely. Because usually there are only two teams that have the same points, but in this group all teams have a total of 8 points which is of course very competitive in the competition that occurs in Group F.