Perform well in a single match and perform well through a long season is very different and with latest seasons, we have enough evidence that Manchester United failed to maintain their performances well throughout a long season. They had some great weeks or months but at the end of season, they failed to achieve their target at beginning of season.
Europa League has many matches, not only one match and Manchester United can be affected by their matches in Premier League too. They can not improve and only play like previous seasons, they actually lack of ability to win Europa League even Bayer Leverkusen will no longer be there.
Under Eric Ten Hag consistency is the biggest problem for the Manchester United because we are having worst results with some good results were also happened, but again things are not as we needed from them now we are heading into new season first game was not bad at all but here we have few talks about Manchester City as well because off the field issues are creating problems for them, and they are having things not as we have from them in last season.
Europa League is completely different competition with many teams are having surprising performance and things can go either way for any team but now mostly are having Manchester United as their main point with can they pull out of their bad runs, or we are heading for another problematic season which will surely ruin their all squad and club if we have results not as expected from them.