The problem with that is that whatever changes or reforms that might happen in Starfleet or Federation society that come about in season 1 is not earned through the plot.
First of all, the entire thing basically shits on TNG's "Measure of a Man" to get its conflict. Remember that great Picard speech and the judge's decision about the rights of synthetic life-forms like Data? Throw all of that out of the window.
I'm afraid you are mis-remembering "The Measure of a Man." The JAG in that episode does not rule that Data is a full and complete legal equal of all sapient beings. She rules very narrowly that Data is not the property of Starfleet and therefore may legally resign his commission. That's it. That's the full extent of her ruling. That's why, twelve years later, the Federation was using EMHes for slave labor in VOY "Author, Author." Because, unfortunately, the Federation's rulings on A.I. rights were incomplete and inconsistent.
So PIC S1 didn't "shit on" "The Measure of a Man." It accurately and faithfully followed up on what canon had already established in 2001: that Data's victory in "Measure" was incomplete.
Also, real history is full of marginalized people winning some of their rights, and then seeing major backlashes. The 13th and 14th Amendments to the U.S. Constitution were followed by almost a century of Jim Crow, after all. So the idea that there would be a major setback for A.I. rights even after Data's and the Doctor's partial victories in "Measure" and "Author" is, in fact, quite realistic.
Moreover, there's nothing shown on-screen in season 1 to earn any redemption that points to optimism. Clancy sits in her office in the very first episode and asserts that the Federation and Starfleet get to "choose" which species lives and dies to justify abandoning the Romulans. Nothing that happens over the course of the rest of the season shows in any way the Federation or Starfleet changing from that genocidal notion.
The entire point of the season is that Picard and company prove to the Federation that that kind of nationalism and bigotry is harmful and self-destructive.
The only thing that happens is a Scooby-Doo villain reveal to the rest of the galaxy that "Oh my god, it was a Romulan cult!" with the attack on Mars, and we're told changes are being done.
It is fair to argue that PIC S1 should have shown more of the pro-A.I. rights legal reforms happening beyond the purview of
La Sirena. It's even fair to argue that it externalized that bigotry too much by having the Zhat Vash be responsible for the Mars Attack. But nonetheless, the point of the season is that the Federation realizes that their anti-A.I. bigotry had been artificially enflamed by hostile foreign manipulation that also led to thousands of their own deaths, and that by indulging in that bigotry they had played right into the Zhat Vash's hands. They realized, in other words, that their bigotry and nationalism had been self-destructive -- just as the Zhat Vash's own anti-A.I. bigotry was self-destructive (their willingness to sacrifice Romulus in the name of fighting A.I.). The season did the work, and in doing so the season absolutely rejected the philosophy of nihilism that Snyder's works so often embrace.
