Rubicon Project Software Engineer interview questions

Drove to office a bit late in the raining weather. Whole day interview, met with both the local and remote interviewers, talked for a different section. Nice people, the process went pretty good.

Applied online. Reached by a third party. 1st round with Senior Director over the phone. Did well, got onsite. Onsite 4 round, 1st with Senior Director, 2nd with Team Manager, 3rd with a different Team manager and 4th with Senior Engineer from a different team. I felt apart from 1 round rest 3 went well. And the one round tooo went 50% well is what 3rd party toldme. But he told me that it was a clear No from all the rounds which I felt is not acceptable as I know I performed well and got answers for all the remaining rounds. Atleast I feel feedback should be provided according to performance. Please dont waste time interviewing for this company.