I was given four options for a tip: 10%, 15%, 20% and custom. I gave the maximum offered. Now you're berating me for not giving more?
20% has been the tipping standard in the U.S. for decades now. For everyone who gets tipped.
So I have no idea where you're getting this from or why you're berating me for doing what was expected. Maybe berate everyone else who orders pizzas too and not just me since you're one of the only ones tipping more than 20%.