I understand where you are coming from and your piece does explain very well why you want people on Medium to stop reading the Doomsayers on the platform. But (you knew a big but was coming) it is wrong that you adnonish people for reading other writers. Thatis the liberty thatyou have no control over and should not. You declaiming against the themes they persist with is fine but to even suggest their ostracization on the platform is an attack upon freedom of expression and speech.
They should be read. And then argue against the content if you are so inclined.
Liberty by J.S. Mill provides the most persuasive and brilliant arguments for allowing all ideas a sanctified space in the 'marketplaceof ideas'.