Interview is not designed to avoid biases. Questions are very odd and not competency based. Questions like - ‘what would you do in the first 90 days in the role’. ‘What would your top 3 priorities be’. I suppose it allows for less experienced people to demonstrate understanding, but its so very subjective.
I also found the interviewers to be quite rude. Some of my answers were probably a bit longwinded as I stumbled over questions I found unusual. We all have bad interviews from time to time but their reactions were so unprofessional. One of the interviewers actually let out a big sigh, the other rolled his eyes.
I should note, I am an experienced manager in this field with over a decade of experience and have been frequently promoted at my current company. I hope the attitude they felt comfortable displaying is not indicative of a wider culture problem.