I could also argue if a barista gets multiple complaints about their coffee it's very much their and their employer's job to go away and figure out to make good coffee.
It's very much not the customers job to learn about coffee and to direct them how to make a quality basic coffee
But also if they get multiple complaints about the coffee being not to the customers liking when the customer provided no details or preferences as to what they like, those would be unfounded complaints.
It's very much not the customers job to learn about coffee and to direct them how to make a quality basic coffee
And it's not rocket science.