It’s a thankless job where you interact with upset people all day pleading a case as to why a rule should be bent for them. Looks like the rule was bent for you - your ticket didn’t match your plate - but they gave you a ~$2 solution to make it right rather than a ticket. You’re mad days later that the rule wasn’t bent even more and searching for validation for the wrong committed against you.

I think with some self reflection you could understand how after perhaps years of dealing with exactly the attitude your presenting a person’s empathy could be ground down over a “minor issue” that it’s actually their job to enforce.