My worst interview ever was my first interview fresh out of college. After the initial phone screen, they asked me to drive 2 hours to their office to give me a "code challenge."

The challenge was to spend 4 hours writing a simple rest API for a blog type thing, but the catch was to not use any existing libraries for data access and instead write an entirely database agnostic DAL. Then after I finished they sat me in a conference room with 3 of their engineers and the CEO to just tear apart my code.
For a JUNIOR position to someone fresh out of college.

I guess I defended it well, because they asked to continue the process l, but after that I found a different position.

*attempting to flirt at the bar*
Hey! I'm a full stack developer, so I can do your frontend and your backend

Worst: being forced back into the loud distracting office, to add on to the badness the covid restrictions were not taken very seriously

Best: getting a new full time remote job and an awesome company with some awesome team mates

Bonus is I now work from home fully but can still hang out with my great former coworkers