Ask the most casual viewer or child and they’ll tell you in just a few words what the prequels and OT are about.
The sequels? Well, things happened. What exactly? Need some mental gymnastics to answer that.

A fledgling hero must join with new friends to stop an evil force from taking over the galaxy, while figuring out her identity. That’s the story. The specific details and internal mechanics of the story might not be good. But it takes far more mental gymnastics to ignore this and complain endlessly in a thread about The Mandalorian.