This is precisely the type of thing you encounter while working in a bike shop. Of all the customer service roles you could ever work, working in a bike shop will confront you with some uniquely bewilderingly entitled experiences. The idea of "you haven't done enough for me for free" will somehow recur time and time again as 1-star reviews bombard you for going out of your way to help someone who doesn't understand how much they don't understand about their bike.
Bonus points here for being blamed for something unrelated that has gone wrong with their bike that you never even touched.
For some reason, everyone expects you to do everything for them for free; this comes from the fact that you generally need to go above and beyond for people in ways you don't in other forms of retail to help them with things that are not obvious about their biking experience.
It comes with this age-old expectation people come in with that bike shops owe you everything. People are utterly incapable of thinking or doing anything for themselves as soon as they cross the threshold of a bike shop's doors. Simultaneously, bikes are still a machine—though a simple one, so there's a lot that can go wrong very quickly—and it's common for people to wildly overestimate their knowledge of them. Their "I know what I'm doing" attitude, particularly among those of a certain age, will backfire time and time again... Every bolt stripped on their frame, fork installed backward, or even just a "broken" drive train where each limit screw was turned in completely the wrong direction.
I could ramble endlessly about this one; this is just the tip of a continental iceberg. But go through the reviews of any bike shop, and you'll see what I mean. There's a reason why every grizzled bike shop veteran can't abide this behavior any longer… They've been burned by it one too many times.
Keep reading to see the review and reactions below. I've included my own translation of what's happening here after the review to help those who are reading the post. Next, see this Karen, who left a 1-star review when a tornado delayed her food delivery.