The overall impression was unprofessional.

Initial communication occurred over the phone. HR asked me algorithm questions, which seemed unusual given that the interviewer appeared to be matching my answers to a predefined list, clearly lacking genuine understanding.

Initial interactions were also confusing, as two recruiters contacted me with conflicting information.

The first two interviewers were quite good. However, the third interviewer was peculiar; he seemed to have no understanding of algorithms while still posing algorithm questions.

Maximum sub-array problem given an integer array. It wasn't that the question was so difficult; the interviewer asked in a way that felt very rude to me. He was not interacting at all, even after I asked questions, worrying that his answers might not lead me to the solution.