honestly I have not had an issue on mastodon , all three instances I’ve had or have accounts on after moving from mastodon.social have required approval to join and many instances are quite active when it comes to cross instance moderation , which encourages instance admins maids to be quite active , though note that , at least the parts that I frequent , are mostly quite open to everything which is not hate speech , however some hosting providers may be less accepting (for context woem.men is forced to look for a new hosting provider after someone reported a picture of two girls kissing as CSA content) .

If you are looking for a server to move to , tools like joinmastodon.com/servers , instances.social or fedi.garden (note: I have not used fedi.garden) can be quite useful . note that joining a smaller server can actually improve your experience , especially if you already found people to follow . you might also find fedi.tips’s article about choosing an instance helpful (note that they also host fedi.garden)

also note that in my , and others with similar views (not only Marxist but also Anarchist and Socialist ) , opinion liberalism being vulnerable to far right wing influences is something that is hard to counteract if not impossible . liberalism either does not acknowledge or does put enough weight to issues that can be then used by far right wing people to capture ground .