>"he just said, No, you're wrong, you don't know what you are talking about."

Ouch. That is truly awful. I'm sorry that happened to you. The irony, their site claims:

"The existing hiring process is broken. We’re building a new kind of interview that evaluates tech skills, not credentials."

If that's their mission there's really no excuse for this. I will be sure to avoid them. Thanks for sharing.