Harver Frontend Engineer interview questions

They sent me the coding task and I spent my time doing it, no matter to the fact that I usually don't like to spend my personal time on interview tasks, my personal opinion is that there is a better way to measure candidate proficiency during the interview process. As a result, they've rejected me saying that my code was not "up to their high coding standards". Really guys? You give someone a coding task, so please spend some time and give proper feedback to the person who spent personal time doing your coding task. As compensation for my time I could get advice/opinions from you, what can be improved and how I can make my code better, but you are not giving this, you are too arrogant with your saying "high code standards". Thanks, glad, that you rejected me.