Agreed. It honestly seems that they aren't annoyed at DC for catering to Silver/Bronze age nostalgia, but that they are not catering to their preferred nostalgia.
It's not like the returns of a few specific characters (Barry, Hal, Barbara as Batgirl and Kara as Supergirl) has prevented DC from attempting to create new characters and elements for the lore at the same time. We are not suddenly transported back in time here.
I've seen people on here who grew up with the pre-COIE material who would probably disagree with that last part. Particularly in instances like what was done to Hal to make way for Kyle, and to a lesser extent, people talking about Barry as if he was always a bore and he only existed to die to make room for Wally, who surpassed him. Kara, meanwhile, could have been killed off and replaced by a legacy and it could have worked, but the route they went with ended up being that she didn't even exist period. That's about as "dismantled" and "destroyed" as it gets.
Except the status quo hasn't fully reverted to what is was during the Silver/Bronze age either. Even with all their reboots, including the big one with Flashpoint, I don't think we've ended up transported back to pre-Crisis. Progression and reversion happen in waves. Sometimes it's a good idea to progress when a status quo becomes stale, sometimes when said progression wears out its welcome it's time to go further forward or revert to a classic iteration when there is renewed interest from fans and creators for it. It's hard to progress all the time because these stories are designed to continue indefinitely, so there are no set endings and a constant change of creative input, so they are not truly progressing towards anything.
There are pluses and minuses to all eras. YMMV on how much the 90s era progressed things across the board. Especially when the foundation for the continuity that would become that era was all about throwing out the past history and even starting some properties over from scratch (Superman and Wonder Woman in particular), which had a domino effect and played havoc with other corners of the DCU. After that precedent was set by Crisis and its toxic legacy, it's not surprising that they revert as often or more than they progress.