Star Trek has always been political. It has always had dark episodes that throw light on injustices in our world. It started with episodes of TOS. The Original Series had less in it than Gene Roddenberry wanted because the studio complained it was too “progressive.” The toxic masculinity of Khan, the false god of The Apple, the cold war standoff in Balance of Terror, Let That Be Your Last Battlefield… these are just examples. Even the world of a democratic socialist society (what did you think the Federation was? Duh) is Progressive.
It has always been progressive. It will always *be* progressive. If you liked previous shows but Discovery bothers you, it is *you* who have changed, not Star Trek. Maybe you should look in the mirror and ask yourself what happened to you.
Because you aren’t the person you used to be.