There's too many ways of doing the same thing (which I assume is already itself a relic of maintaining back-compatibility), there's inconsistencies within the API, there's "deprecated" stuff which isn't really deprecated, et cetera

  dataframe.column

vs

  dataframe['column']

as one example comes to mind but there is surely much more

I am of the philosophy of 'The Zen of Python'

  There should be one-- and preferably only one --obvious way to do it.

Pandas is a powerful library, but when I have to use it in a workplace it usually gives me a feeling of dread, knowing I am soon to face various hacks and dataframes full of NaNs without them being handled properly, etc.