I just have to say that, having been a newbie at one point, with absolutely no background in script programs, I found LilyPond quite a simple affair to learn well enough to accomplish something. After that, it was all about exploring docs. Now I have a handful of students who have learned it very quickly and know how to get solutions. My real-world experience (I have met other Lilyponders face to face!!!) is that the program is well-documented and rather simple to learn. It's not perfect, but at least it has docs!
I must say that, unless you are willing to dig into the program, do something useful with/to it, and contribute to the community, then just let the community be. Ranting to change people's opinions will accomplish nothing. Spend some of your time learning the workings of the program and less time ranting, and maybe you could contribute something.
My two cents. I love LilyPond! Go LilyPond! I don't contribute much on the coding/dialoguing side, but I make beautiful scores with it, and, in a way, that is a contribution!