Yeah, therapy sometimes is about rehashing things, usually because you either took bad lessons from it, never really moved on from it, or something similar, but the goal is to move to a point where the bad things that happened to you are no longer destructively impacting your life.
I think a lot of people think therapy is more about telling you how it's not your fault and how horrible it is that things happened to you, and yeah that happens, but so much more often it's stuff like being given homework to practice setting and holding boundaries, and evaluating why you feel the way you feel about things.