I think so, or at least I think it's maladaptive and pathological.
Look at the trannies, they're absolute fiends for nostalgia, they're obsessed with the idea of themselves as kids, they're known for their historical revisionism, and known for their extreme fetishism and for their creepy and inappropriate relationship to the idea of kids and childhood.
The fact is that memory is a faulty thing, and in many cases our beliefs as to how things were really aren't that reflective of how things truly were or how we felt at the time. Personally I don't recall it being any better, it was fine, but the increased responsibility of adulthood comes with the trade off of increased mastery over your environment. It wasn't that different.
Do you actually have fond memories, or have you developed an unhealthy relationship with the idea of childhood and with the idealized, largely fictionalized sense of freedom you've grown to associate with it as an adult as a coping mechanism?
This is probably going to be a harsh and unpopular view, but at least personally I associate nostalgia with mental dysfunction. Actual real pedophiles (like the actual child molesting kind) seem to be obsessed with nostalgia, not because their childhood was that great, but because they associate children and childhood with the idea of control.
Just personally I don't have a charitable view on the idea of nostalgia, and I don't trust especially nostalgic people. It's creepy and fetishistic.