That's a long post just to complain about the opinions of other people. Maybe just don't worry about it, and avoid pejoratively calling them fanboys? ...and cretins for that matter. Be happy and live longer.
You see, it's not really about their personal opinions of DS9. It's about spreading disinformation about the other shows based on those biases.
I don't mind people that think DS9 is the best of Trek. I don't reject the elements that are attributed to the show, unless exaggerated and polarized. What I do oppose is people making false claims about the other shows.