This is the worst Bundesliga season in a long time. Probably the worst since 2017/18.
Bayern are in no way unbeatable. They have weaknesses, mainly in defence, but there's no one capable of taking advantage of them. Leverkusen lack the consistency of last season, due to CL games. Marmoush sale killed Eintracht season and they're in free fall ever since. After the good start, Leipzig have collapsed completely. 1 win in the last 7 league games. Another failure for Marco Rose to rise to a title challenge. Stuttgart are having the typical season of a club that doesn't have the squad depth to play in 3 competitions (very common occcurence for the 4th team in Bundesliga). Dortmund are a real mess and they're at risk of failing to qualify in Europe entirely (top 4 looks like a miracle now). It's quite telling Freiburg and Mainz currently sit in 4-5.
At least there's still interest on German Cup with the early exit of Bayern so there's that to follow in a forgettable season at the top tier of Germany.
On the other hand, 2. Liga is as interesting as ever with 3 historic clubs at the top spots, HSV, Köln and Kaiserslautern and with only 4 points separating 1st from 6th.