Animo Tech Firmware Engineer interview questions

When I finished my first round, they wanted me to attend the in-person interview, after that, they let me finish a final assessment. I finished that ASAP, but they didn't reviewed that ASAP. After 10 days, I emailed a follow-up and they replied to me that they wanted to move forward with another candidate. I know the truth that it is difficult for NG to find a job ASAP. Finally, I emailed them to ask something about my future improvement and the difference between me and another candidate. They didn't answer that. To be honest, if they didn't want to hire, they don't have to let me finish that assessment to waste my time because I thought I had done it well.