If a worker who isn't the owner says ANYTHING similar to "I'm not really supposed to do this but-" and then does something that helps you, under no circumstances inform the business, including through reviews. You tell them that the worker was polite, professional, the very model of customer service and why you like to go there. You do not breathe a word of the rulebreaking.
The thing about the r slur is that people who are using it again are indeed using it as a slur. This isn't a word that is being reclaimed. This is a word that is once again being used 100% as a slur. You're being a bigot if you're using it against others. Straight up. There isn't another argument to be made. Knock it tf off.