Fortinet QA Engineer interview questions

I was contacted by recruiter and I was given 48 hours to finish a technical test. Then there was onsite interview which took me about 5 hours. I was given a technical test for 30 min, then another aptitude test for 90 min, and then 3 interviewers asked me questions. At the end I talked to a manager. There were too many questions for the given time to answer them and I believe it was not professional to assess candidate skills with such long back to school tests. My interview with the interviewers also didn't feel professional. One of the interviewers almost didn't ask me any question. My impression during my interview was that Fortinet culture would not be something I like.