To give the poster the benefit of the doubt, it's probably just a very poorly worded frustration that /r/20flavorsofshitpost (with the mindless horde) is operational when /r/thethingiwant (with a passionate small community that adds a lot of value) is dead. It sure could have been communicated better, but I really don't think it's meant to claim the protest only affects the poster's interests.
It's harder to see the difference when 10% of a huge sub leaves than 80% of a tiny one.