Nostalgia is denial – denial of the painful present…
IMHO, this seems like something of an oversimplification, or generalization. I feel like I can be fondly nostalgic about my childhood in the 1970s, while at the same time thoroughly enjoying my life at the present moment. And, in fact, I do feel this way! My life is pretty great right now, all things considered.
... and the name for this fallacy is called golden age thinking – the erroneous notion that a different time period is better than the one one’s living in – it’s a flaw in the romantic imagination of those people who find it difficult to cope with the present.
Again, IMHO, I don't think it's either a "fallacy" or an "erroneous notion" that my childhood was a very special, magical, wonderful time compared to other decades of my life. The decade of the 1970s
was a better time in my life,
for me, not necessarily better in general or for other people. Now, of course, some might say that I'm merely being irrationally nostalgic, and that I'm forgetting all the negative stuff that happened when I was a child. There may be some truth to that, but obviously it must be the case that for some people, a prior epoch of their life was actually, objectively better than their current one. My elderly father, for example, who is suffering from dementia, certainly lived though
much better decades than the current one, and the same is true for his long-time companion and current caregiver.