It all just boils down to "I hate that people anywhere can listen to radio stations on which people express views that don't align with my own!"
"I know very little about the radio business"
Well, duh!
That means you shouldn't talk about it the way you are, because it shows you're an ignorant buffoon.
"Talk radio is Trump and the Republicans’ most important tool because it is the only major medium with NO political counterpart on the left."
1. You have NPR, and that's taxpayer- funded, to boot. In fact, to that end, I'd say things are pretty much even in terms of voices in media: The right controls talk radio with the exception of NPR, and the left controls TV news with the exception of Fox News.
2. You lefty scum tried having as far- reaching of a left- wing radio network with Air America (BWA HA HA HA HA), and that crashed and burned everywhere it went due to a combination of low ratings, no sponsors, and corruption scandals (i.e. Its owners attempting to steal money from a children's charity of all things to help fund their failing network).