I'm not trying to be nasty when I say this, but I think you're starting to sound like an old person who fears things, fears change, and I think you need to challenge that. With the digital age, information stands a greater chance of permanence but its permanence is highly dependent on how humanity uses it, that's aside from how easy it is to add more information to the pile in total and thus compounding the problem. Take my wife's phone for example: She's probably got 10k photos and videos on it by now. Is the information organised to be easily accessible and therefore allowing her to quickly find something amongst that lot? No. If it's not filed in a usable manner then it's often as good as lost.
I bet that while maybe one person here (without looking up anything) can remember the name of some racist Karen from a year or two ago, there wouldn't be any consensus about which one it was. I certainly can't remember any! Being a moron is part of the human condition, there's just so many of them; maybe if there was one Internet-famous racist Karen per year then *maybe* people would stand a chance of remembering. There was that wedding registrar who got fired (I think?) for being a homophobic bitch, I can't remember her name and I doubt that I could pick her name out of a multiple choice question either. The crimes have to be a lot bigger, like Brock Turner or Kyle Rittenhouse, for people to start remembering their infamy longer-term.