Most of the content featured on social media is hate speech. Hate drives engagement so it's amplified.

And most of that hate is still considered acceptable even under the most restrictive policies.

I don't understand why the left is so tolerant of (for example) ageism, misandry, and racism against white people even though it clearly costs them politically.

Yes, it's a difficult problem isn't it. On the one hand there are people behaving poorly towards other people, though which people they are and how poorly they are behaving depends on the opinions of each individual. On the other hand the insidious arm of the government reaching into the affairs of a free people and controlling thought by controlling media is not quite a comforting thought either.

As usual, if people would stop being so shitty to each other and greedy for themselves, none of this would even be necessary.

I've seen "hate speech" be defined as anything "I" (the reader) don't like and is offensive to "me" (the same reader). So shrug I just don't see why it's not up to the platform (as it is currently) about what they want to host, aside from illegal stuff like imminent physical threats, terrorism, national security, and similar.