When one realizes that they seem to be the only one that hates something or someone that everyone else loves, enjoys, or praises, because they still harbor memories of when said person or thing used to suck.
Person 1: "Everybody loves Robert Downey Jr. now & I just don't get it. I guess I'm stuck seeing him as the awful, trainwreck he was when he was younger."

Person 2: "Sounds like you've got Jimmy Fallon Syndrome."
by noSreanganOrm March 30, 2023
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