Amazon worst interview

The interviewer asked about time complexity of algorithm and I said O(n). However they insisted it's O(2n) although I told them the constant doesn't matter in big O. They didn't seem satisfied.

Then during Q&A I asked them a "what" question and they answered "yes". Then for a different question they gave a very generic answer (like - what do you use to do this? - We use programing languages.).

There were other times when the interviewer either made factual mistakes or didn't seem interested at all. And on their LinkedIn they claim they were the BAR RAISER. Lol.