Some people are not very good at math, and some aren’t very good at drawing, and some aren’t very good at critical thinking.
You can’t expect everybody to be good at everything. Or as Lincoln said: “you can fool some of the people all of the time.”
It’s really frustrating trying to debate someone who thinks talk radio is evidence, or who can’t see a rhetorical fallacy. But I think I just have to get over it. I might chip away at fallacy, and offer a point on critical thinking now and then, but mainly I’ll just have to live with it.
[This is not to say that I don’t make these kinds of mistakes myself.]