Recruiter was very unprofessional. Came too late and then asked me to rescheduling and I was really surprised how unprofessional he behaved. How must be the company be when even the interview was unprofessional

I interviewed with them for about two months, from HR screening up to panel interview after a time-intensive assignment. ( which does not take 3-4 hours as they suggest, unless you were already very familiar with the AEC industry and their competitors ) During the final review, I was told the team 'moves fast' once they find a fit and to expect an answer within days. Unfortunately, my follow-ups after one and two weeks were ignored. I eventually received a generic rejection email. When I requested specific feedback—given the two-month time investment and the assignment I had completed—my request was ignored. While the team seemed nice during the interviews, the lack of transparency and respect for a candidate's time at the finish line was very disappointing.