Reddit is one of the most valuable websites on the entire internet. It's being miss-managed, and therefore it either needs new management or it needs to be replaced by something else.
The reddit community has tried to get new management put in place and seems to be failing, so plan B is to replace Reddit with something else.
I don't think just "getting rid" of reddit is an option at all. It needs to be replaced with something better. And that something is not Medium.