Being in second place in the Bundesliga standings so far is probably their best achievement so far and at least has proven that they are able to rise from adversity even though I personally do not favor that they can win the Bundesliga trophy because Bayern Munich certainly will not allow the team below them to overtake their points on the standings, Bayern Munich is more favored to win the Bundesliga trophy because their game performance is much better than the performance that has been shown by the Leverkusen team.
What happened I think Leverkusen could not defend the title they had won last season with a fairly good advantage. If you judge this season, Leverkusen has indeed declined, but they are still performing well. It's just that the competition from Munich is getting tighter and Munich has managed to excel.
With the current situation of course Munich will be more favored to win the Bundesliga Trophy this season. Besides they have lost last season, of course they don't want their dominance to be replaced by Leverkusen.