You are unfortunately describing things that are separate from any "social network", they are unhealthy and detrimental behaviors that have metastasized and are

You are unfortunately describing things that are separate from any "social network", they are unhealthy and detrimental behaviors that have metastasized and are manifest in society today in general, mirrored and amplified online where people can find whatever pity party echo chamber they fall into, which will then only be amplified through self-reinforced "moderation", aka censorship. It's actually precisely why we need free speech more than ever, because those who withdraw into self-censored echo chambers need to hear things that are not their favorite things to hear even more than those who demand free speech. Not doing so will only end poorly.