What is the most bizarre reason you've been rejected

I gave an interview on Monday and was really good candidate but after final round behaviour of the hr and hiring manager changed , my interviewer asked me unrealistic scenarios of system design , concept which himself doesn't understand clearly and then keep cross questioning me , schedule calls and cancel the invites , hr ignored the msgs of updates and later say you didn't fit the culture , until yesterday when hr said we will be rejecting you , which clearly wasn't justified as I had 4+ technical rounds cleared within a week + referrals, no written communication in between anything . When I tried checking with recruiter , they didn't help and now after asking feedback also they have very much cold behaviour against me ,hiring manager doesn't reply , they aren't ready to give actual reason.

I feel like I should post everything with photos of emails and everything . They have done similar with people whom they interviewed in my network , constantly ghosting without proper reason. Never apply to this org .