impossible, when the platform itself is the one enabling or promoting, google/youtube, meta all allows it and encourages because its more advertisement money, plus it shores up male/right wing voters which will benefit the companies in the long run in the form of low/non-existent taxes plus tax havens, they think long term. “left leaning”(that is not annoying tankie rhetoric) content is almost universally quashed or heavily astroturfed on most SOCIAL media.

Reddit is getting there. Only way is to host your own forum ,and have controls, probably some form automation to block trolls spammers. the users should be cognizant what is being said and fact checking themselves to prevent themselves from being drawn into disinformation/misinformation.