I think we can live without that. Level Mayhem is trash
I feel really happy that my game in your small list is one of those that broke your really tough judgment, I even admit it and I really would like to say thank you for your willingness to say this out. However, I think Level Mayhem is actually a very good game when you experience this from the beginning to the end and it also has some super cool levels.
There was old times when Level Mayhem seemed to go in the list as the most of creations from Explore. Now, Level Mayhem is actually somehow similar to my project considering it has a lot of types of levels but where only middle and boss fight levels are special ones. I just haven't done that many levels yet. Maybe Level Mayhem just need a better trailer that would show the best from the game in a very short time so every watcher would notice.
In addition, to it PB Explore have actually also some more quite a good games that someone else does not mention and would for sure be worth of being in Featured if those authors just would continue working with their projects.
But yeah, I must agree with you that most of games and levels are complete trash like you say. I can say that because they will not see what I am saying.