"I had a boomer come in..."
No, you had an unreasonable customer come in, and you decided to highlight that he was a boomer in order to disparage a societal classification.
You know, just like many boomers do about millennials.
Was this dude white? Maybe he's unreasonable because he's white, and you know how privileged they are.
Or maybe he was an ethnic. Darn ethnics are getting so uppity.
Or, maybe he's just an idiot. They come in all shapes, sizes, colors and ages.