My ex wife cheated and I told everyone. Guess I petty and people are telling you to "save face". I did basically exactly what you did and less than a year later not one single person cared about my role in the whole situation. You outted a bad person and showed everyone they were bad, honestly you did this people a service by making sure they know that person is shitty, the people calling you an AH are idiots you could scam with an mlm and they'd still act like "it wasn't my fault"