Conversion interview questions

The interview process was incredibly long and difficult. There were 5 stages in total and two projects which took me 1-2 days to complete. The interviews were constructed in a way that hindered me, rather than helped me. The whole process was a major red flag for me from the start : the job was advertised as “not yet available” on the website, but the recruiter insisted that there was a vacancy. I am now convinced this job is fake due to the fact that it was reposted a few weeks later.