youth is no longer one of the happiest times
Which has always had the strong whiff of bullshit marketing imposed by patronizing adults, trying to force a square peg into the round hole.
Like the guy said at the end of the '93 comedy film Dazed & Confused - "If I ever start referring to these as the happiest days of my life, remind me to kill myself", and he was the cool, open-minded star athlete, the one best equipped to have a good time in his youth.