Here is the problem, here is the hard science, here is how we can fix it.
Flat earthers and the like don't get nearly as far in part because they have no such counterpoint to leverage. They remain on the fringes, not taken seriously. Climate change deniers could be relegated to the same fate if we'd be clear about predictions vs science, and ease up on the doomsaying. Doomsayers tend to be ignored for good reason. The world is always said to be ending, yet it never does. Instead it's become drastically better, historically. Global warming is a problem to be solved. Stick to the science.