I used to enjoy the competitions @CleanMagicAudio, but I can see why Envato hasn’t had them lately. You would have to reach out to them to get the specific reason why.
As for no sales and your work being buried under a bunch of others’ tracks… the royalty free music business is a difficult one. I have been a buyer here for nine years, and have been uploading tracks for five years. The number of authors has grown tremendously in that time. It is extremely competitive.
Everyone who uploads faces having their work buried under thousands of tracks uploaded each day. But some are able to find buyers and sell their music.
I think (but am not completely sure) that @AurusAudio was not featured by Envato, and did not win any competitions. His work is exceptional, which is probably the most important factor in being able to sell your music here.
Unfortunately, I have also seen forum posts from authors with amazing portfolios who are struggling to sell their music.
I wish you much success.