Pinterest interview: poor candidate experience

After phone screen and a positive acknowledgment the recruiter stopped replying to my email. After requesting my friend who works at Pinterest to check. The recruiter send an on-site invitation. This was after a month of phone screen. The interview was scheduled from 10 to 1:30. I live in South Bay. Left home At 8. Reached by 9:45. Got to know they scheduled 4 interviews back to back without a break. One of the interview asks me a question I solve in first 10 minutes. He is surprised and so looks for another question for next 10 minuets. The last interviewer is angry as if he has he been forced to interview. He is pissed right from the beginning. It’s 1 pm. I am hungry. All I ate was a breakfast at 7 when before I left home. The lunch interviewer just keeps asking questions. Does not let me eat. And when I answer he looks down starts eating. Makes no eye contact. I thought my technical interview went well. But I was really upset and hungry. That I got in to slight argument during lunch. Very poor candidates experience. It’s almost a week since I interview have not heard anything back. I also wrote a follow up email. Not sure what are they up to.