After the first HR round, got the case study,

Almost for a month I got no reply and when I asked (a few times in 10 days intervals), I got a reply that I didn't clear the round and with some really minor reasons.

Company need to understand that people put effort and time in application and they should be open towards them even if they don't want to hire the employee due to any reason, it would be more appreciated.

First time I faced such unprofessional and negative behaviour during any interview.

The process was an HR round with basic intro questions and a case study.