Union Berlin's fall was really quicker than I expected. I mean a complete failure by them actually. Because they didn't just lose the lead. They started a long running bad streak in their league matches. I don't know what the reason was for it. Maybe there was some kind of motivation deficiency there. Especially the embarrasing results against Freiburg and Leverkusen must have dropped their morale even more. But they are still lucky that there has been a long break to take a deep breath.
I'm aware that they are normally an average team. But this good start to the season first must have some meaning for them. They can do better than this now. They have the strength to fight for top 4 and a Champions League ticket as a result. They are in the Europa League on one hand of course. But they might be likely to be eliminated by Ajax. If they do then they would completely focus on the Bundesliga.
That's why most teams that were good at the start of the season turned bad mid-season or at the end of the season. Their mentality speaks for itself here, as well as their experience in defending a position that many other teams are after will definitely put a lot of pressure on them. Now the fact is that they are going down quickly, because I myself hope they maintain their slick performance at least until the first half of the season. but what happened before the half of the season ended they had fallen first.