I agree that the evaluation comment should motivate you to further improve your skills. It would also be unpleasant for me to receive such a form of assessment.
But this medal has a downside...

Remember that there are 7 challenges, one for each day of the week, which means that users must work quickly (and efficiently) to be able to participate in as many challenges as possible, adhering to the rules, quality and time...

@jorgevandeperre has been preparing this contest for a long time, he took it seriously and expected the same approach from the participants.

Checking a lot of applications for contests, I have identified several negative trends.
-In a hurry to take part in all the contests of the week, without exception, participants create quick low-quality posts "just in time" in the hope of getting a few coins. The quality of such posts cannot be high or even average (with rare exceptions).
-There are some participants who have higher social statuses on the platform. They hope for support because of their status, not the quality of the work done. Unfortunately, this situation also takes place.

I absolutely agree that the jury should be as objective and correct as possible and the comments should be respectful. In this case, the person simply did not restrain his emotions, although this is not permissible. But I understand him too.

We all need to be more respectful of the events of these contests, so as not to turn them into an empty formal fiction. And, of course, respect each other and communicate kindly with each other.

P.S.

Anyway, remember that we are not studied artists, but we still want to participate in the challenges and express ourselves.

I think it's not about the professionalism, the skills of an artist or photographer. It's more about a conscientious honest attitude to the task. If I see in the contest the efforts of the participant, the amount of effort and his desire... in fact, this is a more valuable result than a quick simple drawing by a professional, which did not cost him a lot of work (there are some). Participation is, first of all, effort, work and, of course, the result.