NVIDIA interview questions

I had very high recommendations for several highly placed employees (dir, vp). Took forever to get anyone to even call back. Then they scheduled the interview on the one day I explicitly said I could not be there. Had to reschedule for 2 weeks later. While walking to the interview room we ran into another former colleague, he gave an unprompted glowing review. None of the 3 Interviewers seem to have read my resume. I was asked simple questions, not something you would ask someone with 20 years experience who has run 10 million dollar product lines. Yes the job was a step down, but I wanted to get into the company first, then move later. The interview with the hiring manager felt like he was afraid I would take his job. I wasn't even given the courtesy of a call to say "no". I had to find out from my referrals. I got another interview request from a different group later on. But the VP was too busy to find a date to interview, despite being my being very open on time and place. In general I found the whole process very unprofessional. My perception is that they want to drive people as hard as they can, and pay as little as possible.