That sub used to be part of the "reddit left" with a decent overlap with latestagecapitalism etc. Bernie era used to be a good time to "educate" people there about socialism, even if just pointing out that collapse is capitalism's fault.
But given the massive overlapping userbase a lot of those old users moved on, as you know the reddit "left" is a shadow now(thats being generous), so this is just another example of the overall trend of the site. Every criticism of capitalism/US is "political" therefore confined within blue vs red MAGA now.