To the OP:
I know exactly where you're comin' from and don't take this the wrong way but - Welcome to REAL life.
As a good friend of mine is want to say, "It is what it is".
I've been designing scenarios for various games as far back as I can remember. But since the late 90's many scenarios for the original Harpoon, Steel Beasts (numerous and some for USAEUR). Scenarios for Microprose's Falcon 4.0, Sub Command and a few other less well know titles. Most were extensively downloaded; rarely did I get formal forum feed back. On the Steel Beasts forums the guys who designed scenarios regularly made the same plea you have, even the forum moderators and devs chimed in making a strong case for designer feedback.
Result - squat. Players simply couldn't be bothered - until we stopped uploading. Then they'd complain about why no user created content. Users can be a spoiled and ungrateful lot. (for a prime example check out the Total War: Rome 2 Steam forum - those guys take the cake).
Like you - at 1st - I created scenarios to assuage my need to - well - create and experiment with the games. But just like any artist I eventually wanted to see how players received my stuff. It may sound weird but of the little feedback I actually received I preferred that which was negative as that could be used to make my designs even better. So it wasn't praise I was looking for but ways to improve what I made so both myself and my audience would get to experience an even better product.
Not to be though. As you presented - maybe 1 in a 100 bothered to comment (I got plenty of comment from multiplayer buds but they were a minority of users at the time). Eventually I just took everything I'd ever made offline. Now I make scenarios - when I take the time - just for me. If something doesn't work out the way I'd like it is trashed and I move on to something else instead of powering thru to finish it because I promised someone that I'd work on building their idea. Gaming and scenario designing is now a much more relaxed and pleasant experience.
Do it for yourself - you may find that the time you spend at the drawing board will be much more pleasant and way less angst inducing.