EPAM Systems interview questions

Round 1:- All into technical related to Java and Coding programs. Round 2:- interviewed by 2 On-Shore folks, All into System design. asked me to design Outlook meeting flow, Some Coding program, some behavioural question regarding current roles and responsibilities. Round 3:- Interviewed by hiring manager from Offshore. Some system design question, seems he was impressed and then asked me about my expectations and joining date. Round 4:- HR discussion, this was very unprofessional discussion. He was not fine with my expected CTC and instead of negotiating, he told “I waisted his time….”. also said I got rejected in last round…… really ? If yes then why this HR discussion being held. If this is the case then how about my time ?