Some of his fans went so totally crazy over him they aren't really fans anymore.
Well, it seems like everyone was affected by his performance as Willy Wonka in Charlie and the Chocolate Factory that they took advantage of it, all acting like fans in a way that makes him uncomfortable, so that everyone fought to be considered his biggest fans.
People who didn't like him went all crazy and spread the word about how he wasn't all that, just to get attention, when he was just a nice actor like any other actor, not more popular than others then nor now. Just more.. "famous.."
"He doesn't use social media," as you say. That's not a good idea. That's taking advantage of his "faithful fan base."
Amber seems to be flirtatious about her relationship with him yet would easily be taken aback at anything said the wrong way, with Johnny there to protect her feelings.