**Maherism (noun):** A cultural and political ideology characterized by contrarianism and scapegoating, often exemplified by a tendency to challenge mainstream opinions while humorously critiquing the past without offering constructive solutions for the future. Followers, known as maherists, are masterful at being "always right" by never committing to a position, allowing them to critique others’ ideas with impunity. They revel in the absurdity of political discourse, using satire and irony to express their views while maintaining a perpetual air of superiority, as they declare, “See, I told you it wouldn’t work!” whenever an alternative fails.
The act and/or actions in which one would live by as an UBER john mayer fan. Sharing copious amounts of unecessary facts with the rest of the world. Basically, being obsessed with john mayer and pushing him and his music on the rest of the world!
You could call that friend a "perpetual skeptic" or a "vocal non-participant." Another fitting term might be "armchair critic," as they critique others’ ideas without ever committing to a stance themselves. This way, they maintain an air of being "right" by default since they never fully engage in the discussion or take a definitive position.