I have this coworker who praises himself or being vegan an caring a lot about the world and his health, but smokes and drinks quite a lot. He also is very friendly with everyone but then he privately complains about them with me and goes back to be friendly.

I could ignored this behavior until it started affecting me. Now he is just passive aggressive with everyone, including me. The kind of guy who sends a slightly bitter comment with a wink at the end almost everyday. The kind of guy who will talk to you non-stop like he is your best friend and next morning don't even look at you. The one who will try to teach you some lesson whenever you say something publicly (which he did tons of times and ended up fucking up because he had no idea what he was talking about).

I feel like ignoring him from now on no matter what he says, because he is only waiting for the perfect opportunity to make you feel like a not caring human being so he can keep standing out and controlling everyone. Yes, if you ever try to organize something, he will make sure to criticize you.

So... that's it.