Reach3 Insights interview questions

The interview process was very fast and fairly smooth. I had 4 rounds within 2 weeks time which also included an assignment and presentation. The questions were mainly related to what my previous exp was and behavioral questions. After my final round, which I thought went well, they did not get back to me at all, even after follow-ups, the HR ghosted me, which is okay assuming they rejected me, but nonetheless it should be informed, especially after being invested in the whole process of 4 rounds, after investing time and effort, I think candidates deserve at least an email saying they are rejected and should not be left hanging. It is highly unprofessional of them, shows they do not value other peoples time and efforts.