Horizontal .NET Core With Angular interview questions

Office in thane location, i came for interview, First round paper test, Second round discussion with manager, 3rd round was technical, 4rd round was technical. I am very sure, i didn't my best, Even interviewer he doesn't have experience in .net core specifically.. As per the my skill and expertise, i given all the answers. They even asked only 5-6 questions. Atleast candidate should expect, Valuable feedback. But i didn't get any feedback and any mail. Candidate should learn from negative feedback, improve in next time. Please give the proper feedback to the CANDIDATES.