I've interpreted above sentence as follows using ungrammatical English for reading Chinese with ease.
Judging a school's good points and bad points 's criteria there are many, however I think that teachers level is the most important for sure.
The problem for me so far is the 2nd 的 which appears from the leftmost.
I've changed it into 是 instead so that I think the meaning of the sentence makes sense.
But actually the place takes 的. How should I interpret it??