Auronova interview questions

Interview process started on 25th March 2025 with the initial call from the HR and I got the rejection mail on 6th May 2025. There were 3 rounds for which I appeared and after the 3rd round, they rejected me saying that the strict client side requirement was suddenly for regulatory modeling (which I didn’t have at the moment), which was not mentioned to me during this 1.5 months long interview process. Even I made it very clear to the panelists of all 3 rounds about my lack of exposure into regulatory modeling and they were all fine with that, citing that I would get that sort of experience in the company. So highly unprofessional attitude from the company in my opinion. The panelists seemed knowledgeable at least. Unsure whether this unprofessionalism is from the HR side or business side.