It's ok you can be named Karen and not be a Karen. Same for Chad or Dick/Dickson.
Words can have multiple meanings, and so do names.
The context of a sentence usually is enough to distinguish, hence no one meant your mom isn't nice just because we use her name as a insult for other people.
I still get it, don't mistake my comment for a lack of compassion.
It's especially true for teenagers that gets bullied because of things like it. (Although probably less of a problem for Karens since it's a rather outdated name.)
You'd be in the right to be bummed out sure.
But as adults I don't think you should hold as much importance to it, it's how to avoid hurting, lightheartedness and humor is the better response.
Someone named Karen making fun of Karens is just perfect, and the jokes for someone named motherfucker would write themselves!