It's very clear that the interviewer bias is very important on the process. It shouldn't be. On my case, I got a relapsed interviewer that was working on his la

It's very clear that the interviewer bias is very important on the process. It shouldn't be. On my case, I got a relapsed interviewer that was working on his laptop while I was designing the service he wanted and another that wanted a very specific and canned solution for the very specific and canned problem he threw at me, instead of trying to understand my different approach for the problem. 2 of 5 bad interviewers. I left with a bad taste on my mouth, with the feeling that I didn't failed because I was not skilled / prepared enough for the company, but just unlucky for getting a bad set of interviewers. If was just me with that feeling, I would agree that I was biased for not receiving an offer, but I see this happening a lot with good engineers and throwing all the responsibility on the interviewees shoulders with "You are bitter for not receiving an offer" or "gitgud" arguments is just avoiding the discussion. Anyway, it's their process and if it's working for them, they have no reason to change. Just stop advocating as it is a nearly perfect hiring process: it's very clear that is far from it.