FNZ Software Development(Graduate Program) interview questions

Completed the process 2 aptitude tests and assessment day. Waste of time. Received good feedback throughout interview process and was even told that I was "one of the strongest candidates". I believe one of the interviewers deliberately left me bad feedback after an interview which inevitably led to me not getting the offer because I challenged him during the interview by simply asking him a question and he wasn't able to answer it, although he criticised my solution, and he became visibly frustrated after that. Not professional conduct. The recruiter said it was "above his pay grade". Nonsense.