There's a lot of that, it is just that typical media does not cover them as they are not "interesting". Like, there was a Surrounded debate where they brought a lot of conspiracy theorists with one journalist, and iirc they only talked about one topic regarding the government, rest was just flat earth, aliens etc.
There are a lot of theorists that claim how much the government is lying about things, manipulating the masses etc, most of which is slowly coming true.
On a side note, if you have played GTA SA, you must have seen The Truth talking so much nonsense. I would like to share this as I have always found this very funny.
CJ: What's with all the aluminum foil, man?
The Truth: Protection from mind control, dude.
CJ: Mind control?
The Truth: Induction of images, sound or emotion using microwave radiation. D'you know how many government satellites are watching any citizen at any moment?
CJ: No.
The Truth: Twenty three. Do you know how many religious relics are kept at The Pentagon?
CJ: No, I don't.
The Truth: Twenty three. You see a pattern emerging here, man?
CJ: Man, I'm seeing patterns all over the place! Get that smoke out of my face!
Hehe.