Started delightful, ended abysmal. I clicked with my recruiter, great guy. On my 2nd or 3rd round I was to meet with the Hiring Manager (and his boss?) and told it would be a "mix of technical & personal" questions. About 5 minutes before, I get an email with technical requirements for sharing my screen etc. I was ambushed with a live coding assignment that was a custom problem specific to the quant financial domain (of which I have no experience), strangely worded, and Leetcode-style. I gave it my best but the tone & verbal/non-verbal communication from the interviewer was terrible, as was his direction and answers to my question. He told me "everything mattered". Just as one example: before I solved the gist of the problem, the guy instructed me to use a unit test framework for my tests. When I said I'd use whatever the codebase was using he said I could use the Python built-in lib, then instructed me to carefully read the documentation. It was a belittling, pedantic, micro-managey and absurd waste of my time. He also at one point told me to write a test for a non-negative value when I started writing one for a zero value. Then of course instructed me to go back and write the zero value test. The fact that this was the hiring manager made me decide I didn't want the job about 15 mins in. I didn't complain to the recruiter but let him know I was caught off guard, and now I've been ghosted.