]In fact, most clubs in the Bundesliga always aim for the title every season.
I don't agree with this. In fact, I feel it is the other way round. Most clubs in the Bundesliga just want to compete. They don't aim to win the league title. If they are among the top teams to go to Europe, then they had a good season. It's that way with a lot of leagues; the difference is, in other leagues, like the EPL, more teams aim to win the league.
Aside from Bayern Munich, I can pick only 3 or 4 more teams that aim to win the league.
In my opinion, after Bayer Leverkusen lost their best player this season and got a new coach with a poor reputation, I don't think the Bundesliga will be competitive next season.
They will struggle even without selling top players, it just got woars now. About four of their top first team players have left so I don't expect much from them. This is one of those seasons where bayern will just take the league without any solid competition. Leverkusen have to be careful or else they might have a bad season.