There's also the classic "Serenity now!" Seinfeld episode.
What happy, positive-pychology folks can do to critics is what Garcia did to me, as I reported in the article's postscript: they can block you from their minds, to keep their thoughts positive. "Serenity now, serenity now," goes the mantra. It's essentially a form of consumer narcissism, the ideal being to block out negative reality, to live in a dream world, in a safe, woke space like a child.
If an adult wants to live like a child without hurting anyone, it's none of my business. But what offends me about Garcia's writings is his pretense that he's doing philosophy.