> Most tech companies now do around 4-5 interviews. [...] After being subjected to these demeaning Leetcoding interviews I went through a refreshingly pleasant experience. It was an interview with just one person. They gave me a technical open-ended problem and two weeks time. [...] I did have to spend around 30 hours researching that problem as it was an unfamiliar problem space for me.

For me it's the complete opposite. What I would consider demeaning is to spend 30 hours across two weeks interviewing for just one company while they don't even bother to send more than one interviewer.