Kinseigh
More commonly known as Kinsey, but also known as Kinsay, a Kinseigh someone who, ironically, uses the term "Karen" far too liberally, or doesn't understand what a Karen actually is, despite being closely related to Karens themselves. A Kinseigh will always blame the customer no matter how much they or the business is clearly at fault. Kinseighs are also incapable of taking anything seriously, often lurking in comments sections laugh reacting at things that are inappropriate to laugh react to. They believe they are trendy and chill, with their favorite phrase being "it's not that serious", and spend much of their time in the comment section blaming people for things that are clearly not their fault. Kinseighs are also a close relative to Trolls. Kinseighs make hard working employees look bad.
That customer was polite to the waitress, yet the waitress was rolling their eyes and huffing at the customer. That waitress is such a Kinseigh.