Two examples immediately spring to mind, Andrew Tate and Jordan Peterson.
I’m sure both have had some moderately useful things to say at some stage of their life for some folks, but a quick look at their Twitter profile tells you everything you really need to know now.
To be fair, several years ago Jordan Peterson seemed quite genuine and earnest about wanting to do good in the world...and then his Benzos coma happened, and he was out cold for several months in Russia or something bizarre, an it's very, very obvious that he has never recovered from that.
Like, we're talking some amount of genuine brain damage damage which he's just stuck with now.
Twitter was also just not a good place for him at all. Some people just get sucked into that sort of stuff, even though it's terrible for their public image, and even though there is so much more they could be doing. Anyone remember how people made fun of eg. Richard Dawkins and Neil deGrasse Tyson for being obnoxiously atheistic on Twitter? Yeah, it's a bit like that.
I’m sure both have had some moderately useful things to say at some stage of their life for some folks, but a quick look at their Twitter profile tells you everything you really need to know now.