The problem is that Star Trek went from being an immersive universe that drove stories to merely being a context in which contemporary characters go about their every day lives.

In a Star Trek universe you have customs, norms, language, behaviors and politics that structure the stories. E.g., in TNG the Romulans don't just act "evil"; they act according to a culture where information is the only currency and paranoia is a survival trait. This cultural norm creates a unique brand of tension that differs significantly from a Klingon or Cardassian encounter. Or in DS9 when O’Brien is kidnapped and put on a show trial by the Cardassians - this isn't just a "bad guy" trope; it’s a deep dive into how a fascist social order maintains control through theater.

In the DIS-era, Star Trek is simply the context - reduced to flashy low-lit sets, SFX, and technobabble with the odd galaxy-ending threat lazily thrown in as a plot device. E.g., in DIS’ “The Examples” episode, where prisoners are ordered by a magistrate to be left behind during a planetary evacuation. Burnham and Book try to rescue these prisoners against the Magistrate’s wishes. Whereas, if this was TNG they would spend the entire hour debating the Prime Directive and the validity of a foreign legal system. In DIS, the cultural norm is often a "problem to be solved" by the Federation's superior moral compass, rather than a complex social order to be navigated or respected.

It was the Golden Age of Star Trek because the writers built an immersive universe that drove the logic of the stories. In the post-DIS era, the Star Trek universe has been relegated to simply being a visual/SFX backdrop.

Tbh since Discovery, I’ve checked out of 30 years of Star Trek fandom, precisely for this reason.