The decision by Leverkusen to choose Ten Hag at that time surprised many fans. And now his very quick dismissal also surprises many parties. That decision is good to be made quickly, but perhaps most people think he should be given at least half of the season. But Leverkusen is very firm in this regard.
First of all Bayer Leverkusen was too fast to employ Ten Hag I know that they needed a replacement for Xabi Alonso since he left for Real Madrid but they should have made some considerations before appointing him that would have saved them all the stress.
They also took a very fast decision to sack the coach that wasn't totally bad because they already confirmed that he's not capable of getting things done in the team.