Well, one of my bugbears is that most open data is released in weird formats.

Take the boston housing dataset as an example:

http://lib.stat.cmu.edu/datasets/boston

This is one of the most popular beginner datasets around. It's often used in tutorials and when experimenting. Does everyone who wants to use that have to write some custom parser? Why? https://csvbase.com/calpaterson/boston.csv is just so much easier