I hope Leverkusen can achieve more than they have won this season, defeat in the Europa League Final disappointed everyone involved in Leverkusen. Due to a small mistake when facing Atalanta, they failed to win the first Treble Winner in its history. Next season Leverkusen will play in the Champions League, they must be better prepared and need to develop their strength to face bigger challenges. They may be able to maintain their dominance in the Bundesliga, but there is no guarantee of success in the Champions League because the level of competition there is more competitive than in any other tournament.
I think it was not because of a mistake that Atalanta beat Bayern Leverkusen in the Europa League finals. Before the Europa League finals, Atlanta was in amazing form, which helped Atalanta be in a better position to beat Bayern Leverkusen in the Europa League finals. And if it was a mistake that made Atalanta beat Bayern Leverkusen, the score of the Europa League finals would have been 1-0 or 2-1. The UEFA Champions League competition is a different competition from the Bundesliga. Bayern Leverkusen needs to be at their best performance if they want to qualify for the round of 16 because they will be playing against the best clubs from other European Leagues.
I don't know what happened to Leverkusen in the final match, but what is clear is that they failed to win and had to accept defeat with a landslide score of 3-0. This was a match result that was not previously predicted and surprised many people. The reason is that we ourselves must have followed Leverkusen's game until before that match, they were an unbeaten team. And finally we saw their first defeat of the season in the European League final.
Atalanta had prepared it all, they analyzed Leverkusen's game and they succeeded in finding gaps which they were finally able to exploit well. I agree that Atalanta played well before that match, even though they also lost to Juventus in the Coppa Italia final with a narrow score of 1-0. However, they managed to recover and in the end they were able to successfully beat Leverkusen in the Europa League final match.