This one guy in the comments section of the Aftenposten news site says that you can't trust climate science consensus because there was once a scientific consensus that the Earth was flat, that the Earth was the center of the universe, and that the sun orbited the Earth.
It's a myth that the ancients believed the Earth was flat.
As for the rest: Yes, it's possible that there's a better model to explain our observations, but as far as I understand it, the current fit is very, very good.