Clearly you aren’t paying attention, it is absolutely not only the mainstream media that dislikes old white men in politics. Also, you may be blinded by your dislike for trump, but he would absolutely annihilate basically every Democrat in a debate, as he did with Hillary. He can speak coherently, he just speaks in simpler terms, because it’s far easier to remember some of the things he says. He speaks like that for a reason. Go look at how he spoke in the past compared to now, he does it for a reason.
And btw, I despise Hillary Clinton, but at least she can speak well and work her way around a debate, Warren would be a joke compared to her in a debate against trump.