The different atmosphere in the European league makes it possible for us to see the intense competition taking place in the European league so far, Manchester United and Tottenham are two big teams that this season will try their luck in the European league, but like what happening in the European league previously, so far the big teams are not guaranteed to be able to win the European League trophy, Last season we could see how Liverpool, Milan, Roma and Leverkusen were favorites from the start to win the championship trophy in end season, but in fact Atlanta was able to surprise us with their ability to destroy these big teams and win the championship trophy in the end, the ambition that every team that plays in the European league has is very big regardless of whether the team is weak or not in terms of team quality so far, based on existing experience, I personally don't see it either tottenham, especially Manchester united can win the European League trophy this season because both teams are still in poor form.
The poor performance in the domestic league as seen in Tottenham and Manchester United is also not a special reference for them to perform badly here because both teams could perform better in the European League this season even though they are not good enough in the domestic league this season. I actually quite agree with the examples and descriptions that you gave of Atalanta and several other teams from last season, but for this season the conditions in the Europa League will also be very different considering the new format that every team that enters the Europa League this season must go through.