Leverkusen's performance in the Champions League was also not so good. in the first match against Brugge, Leverkusen also lost 1-0.
whereas in the Bundesliga, they performed very poorly. it's very different from what they showed last season.
last season, Leverkusen was in the top 3 in the standings. and currently, Leverkusen is almost part of the relegation zone.
You noticed that Brügge has won all the other games with 4 scored goals against other big teams , so i guess its not bad that Leverkusen only lost with 1 goal.
And the last season it was nearly the same as right now , as they havnt got a good start into the season there too.
They will leave the relegation zone at some stage , trust me .