Maybe showing it is difficult, but it looks to me like you're not even trying. You make very poor claims, and only present stuff that's even remotely sensible later on. For a good argument, you need to think through all of the possible objections ahead of time and then present your best case, not your worst.

Ditch the emotional language, ditch the obvious fallacies, and present a good argument. If you are still dismissed with that, then you can complain about it.

I know you say that you've done this and have still been dismissed. That does not excuse putting forth bad arguments now and then complaining about the reaction. Do your best, or don't bother.