No matter how kind, warm, thoughtful, amazing, cheerful, consistent, and perfect I treated people roughly 5% of them would just be terrible (yes, I have the numbers to back this). I’m not talking about people who were having a bad day or people who were trying to work the system. There was a legit 3% to 5% of people that just wanted to be mean, nasty, selfish brutes. People that were unpleasant to be around. People who for one reason or another “wanted the world to burn” (in the words of Christopher Nolan).
This mirrors my own experience in virtually every area of life.