These companies are widely criticized for enabling harassment, hate, and violence. But these aren't the primary content on these websites. Forums largely dedicated to hating women and trans people are in a meaningfully different category.
Ah, so now the goalposts have shifted to "the primary content is something I find objectionable". Why not just take down every site with that kind of content, if the "deaths linked to the site" isn't actually why you want to ban it?