Sometimes it takes a long time to really get to know someone or something - some people are really good at hoodwinking, but most of us eventually see the light.

You can fool all the people some of the time, and some of the people all the time, but you cannot fool all the people all the time.
Abraham Lincoln https://www.brainyquote.com/quotes/abraham_lincoln_110340

Good riddance. (My recommendation is to quit them altogether.)