As someone who devotes there time to only making levels, I've by now made upwards of 250 levels I would say (some posted, some not), and of the ones I have made, I have learned some very good things.
What I like to look at is rather how many people have downloaded the levels, rather than commented. I like to think that this many people have downloaded the level, and I also love to think my level was challenging to some, and maybe even some gave up.
I personally prefer to post very challenging, at times mindbending levels, as opposed to little puzzlers (though I do at time like to do the latter here and there), because I really like to create a nice excercize of the fingers, but definately moreso the brain. I do once in a while have one my more difficult creations end up with 1 or 2 comments, or gain a reputation that "this level WILL be hard" concidering the types of levels I am pumping out at that point, however, I am absolutely fine with that. I like that people have some fear to play my levels. In fact I'd be quite insulted if I had 10 comments from different players in 1 day, because then I'd know my level wasn't the kind of level I was probably attempting to make
From one level maker to another, being a "trusted" level maker isn't something people dub you, it's what you dub yourself. At the very beginning of making levels I had a bit of low confidence, especially when a level recieved a low number of comments, but now I realize that is just how it goes. Some with a specific flare will recieve 8+ comments, some very difficult will recieve 3-, and for whatever reason some you thought a bit dull will be rather popular, and others you thought were amazing won't be commented too much, but I know I'm still more proud of the one I liked more.
So just keep up your inner confidence in closing, because I am sure you have your own wonderful wonderland style, and soon enough none, or 20 comments will maybe change if you are MORE proud, but never if you are less.
Good luck!