I am not above reading trash, and you often have to accept crappy writing in genre fiction. My wife reads the trashiest pulp romance there is. But even considering the low-grade prose in our diet, Dan Brown's writing is worse by an order of magnitude.
I'd rather gargle diarrhoea than read his shit again.
I'd rather attend a school play.
I have ADHD, but I once spent a day looking at a wall rather than allow his tepid faeces into my person.
He passes the turing test: machines cannot write that badly. His word choice smells like burning tyres, his sentence structure is like a drunk driver in a car park. He's a phenomenon.
Choose:
a) Dan Brown
b) https://www.youtube.com/watch?v=PLOPygVcaVE (you must watch it all)
Is it better than a lot? I mean, almost certainly is in the mix there. It did enjoy a lot of time in the spotlight in ways that somewhat surprise me looking back. I couldn't say how it caught the attention that it did.