New Classrooms interview questions

There were 4 rounds to the interview process and a take-home test automation assignment. The application that they had me write automation scripts for was VERY unstable. The UI was changing back and forth every other day. Not to mention I was strung along through the interview process where they pumped me for information on what test case management application they they should use and what bug tracking application they should use also which automation framework they should use and why, after that conversation I get the rejection email. I then saw a new job post mentioning everything that I had mentioned in the interview from the same company. I was very disappointed with the entire process. Also, I have worked at companies that handle PII and PHI data and they don't even have 4 rounds of interviews.

Conservation and beginning of the interview flowed quite well but it looks as if the interviewer purposely gave hard questions to throw me off. There's a phone screen then an excel test.