For me it's quite the opposite in all honesty.
As I've entered my 30s, I become more and more fond of my memories. Without a doubt, I'm one of those old soul types. I prefer things of the past to things of the present, and I tend to be either indifferent and somewhat resistant to the changes of the present. Nothing in the present day really inspires, or fills me with wonder. It's all just... whatever. I feel very cynically about the present. I can't even stand the haircuts that are considered fashionable right now. But it all seems to be a moving target with me as I age. The previous decade is looked upon more charitably than the one I'm living in, even while I felt far more cynical when I was living that period of the past. I look back now quite fondly on my days as a young adult, the 2000s particularly and pine for a return to the way things were then.
I often find myself comparing things "in my day" versus the way those things are now, and for the most part feel the current state of affairs is inferior. For example, back in my day we had arcades. Nowadays, there are none left in my area. With the way society progresses and moves on, it's likely I'll never see anything like an arcade again. It's simply gone with the past. Then there's the stark contrast of social behavior before and after smartphones. I feel like there was more humanity, civility, and realness to people before everyone had this collective mind in their palm all of the time. I often wonder what it would have been like to have been born much earlier than I was - to experience long bygone eras first hand, to feel like I could actually get lost when traveling, and like there might be something unique to see and do in the next town, before mega-corporatism hollowed out everything that made each place it's own. To be engaged in the things people did for fun before staring at a screen in any capacity ever became a national pass time.
But that's all an abstraction of my nostalgic feelings. I don't really know if the past is better than the present, but the grass always seems greener. I know that the times of my youth, seemed to be simpler and happier than the ones I'm currently living. It could just be that a younger mind doesn't perceive all of the negative things that become apparent when you grow older. My parents probably felt weary of raising kids in the 90s, and now I would feel weary of raising them in the 2020s.
Nostalgia is a complicated topic, but yes, I am very much a nostalgic person and I find that growing older makes me all the more fond of the past and that's never waned. If I didn't cherish where I've come from, I don't know that I'd have much to ground me at all. In many ways it informs the path that I want to take going forward in life, and tomorrow isn't a guarantee, so I refuse to put faith in any promises that the best is yet to come.