Three technical rounds - Pathetic experience. Interviewers are rude and stubborn. It was a very negative experience. I generally don't interview with small companies for this very reason.
1st round - Three coding problems all LC medium. Cleared
2nd round = All design questions the interviewer was okayish certainly not friendly but still manageable. Cleared
3rd round = This was with one of the senior folks, generally people at this level are modest and engaging. The interviewer was very rude and it felt like I am being interrogated. I wonder how he must be treating people working in his hierarchy.
Also the reviews here speak something.
I would recommend to dig down and find details before jumping the ship.