Guess this contest is no official contest? Not directly supported by the forum owners, right?
As far as I know, this is a contest created by a forum user, correct?

So, not being an official contest nor with the official sponsorship of the forum administrators, they have no responsibility or involvement in it. Unless the forum rules are violated, which they didn't.

The user, or users, who organized the contest use the rules they think they should use and are presented at the very beginning. It is up to each one to participate or not. As a contest for the community, there is an opportunity for everyone to express their point of view.

Now, it's not worth going around saying that everything was done poorly, that the contest was distorted, that it should be done differently or something like that, to the point of offending others. This is totally inappropriate.

Do you think you could do better? Then promote you a new contest.

I don't think it's worth going around here always saying that everything was bad and that some abused it. Unfortunately, this is already known to happen and it will be a struggle that the entire community must continue to try to counteract.