Reached out by their recruiter, talking about what I do at my current job, then was set up for a first-round introduction interview with a hiring manager (or just a software engineer).

This is the rudest interviewer I have ever encountered in my career.

1. When I joined the Zoom and turned on my camera, I said good morning with the interviewer's name, but received no response at all. He only proceeded to ask about my tech background.
2. There was no eye contact at all.
3. The interviewer looked like he was angry to be put in this interview process, or he believed he was better than the interviewee and didn't need to show any respect. He didn't know that the choice is mutual.
4. While I said I used this and that tech in a project, he had no idea the reason why. Seriously?
5. He kept interrupting me while I was talking about the project I am working on, then asked about one specific thing he knew about.
6. Got ghosted after the first round, of course. Total waste of time!

Introduction interview, talking about what I did at my current company. Even the interviewer showed no interest or respect.