Earlier quoted context omitted.
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I just tried signing up for X using a new account. 99% ultra-right wing political content with obscene amounts of overt racism, anti-semitism etc. Even though when it asked for my interests politics wasn't even an option.
So just follow the accounts you're interested in? If you just signed up, how does the "for you" know what you like? You can spend all day on X and never see any of that stuff you mention.
Do you prefer "ultra-left wing" content? There's plenty on X, including angry marxists, anti-capitalists, de-colonisers, race-baiters, compulsive virtue-signallers, tantrum-throwers, Musk-haters, dis-information trolls, intifada-fascists, take your pick!
I remember back when Trump was president, every single post he made on Twitter had a torrent of abusive replies bubbling to the top. Even ordinary mundane posts about routine things happening in government were met with endless insult-memes. Surely you don't think Twitter was once a place where inflammatory posts were rare and everyone had good manners?