Billionaires controlling the media for manufacturing consent is not a new idea, and even then, leftists/QAnon people have very different views on it anyway. Leftists don’t believe there is some secret cabal, the ruling class is very blatant. Right wingers believe in some deep state or the rothschilds, who are a jewish family, “control the narrative”, they don’t care about class struggle. This comparison makes very little sense.

Also-

QAnon centers on fabricated claims made by an anonymous individual or individuals known as “Q”. Those claims have been relayed and developed by online communities and influencers. Their core belief is that a cabal of Satanic,[3][4][5] cannibalistic child molesters in league with the deep state is operating a global child sex trafficking ring and that Donald Trump is secretly leading the fight against them.[9] QAnon has direct roots in Pizzagate, another conspiracy theory that appeared on the Internet one year earlier, but also incorporates elements of many different conspiracy theories and unifies them into a larger interconnected theory

I’m not seeing the relations to “left extremes” here at all.