For single event traumas from my adult life, I've found "telling the story" really helpful. And going into detail about facts helped unstick a lot of the emotions. Probably because being older when those events happened, there's not as much confusion in my brain about the emotions and beliefs tied to the events, but also because it stopped it all going round in my head. That form of exposure has worked for me.
But it was simply retraumatising when I tried that same process with a former T regarding my childhood trauma, and I routinely ended up dissociating or switching, so nothing actually got processed, it was just incredibly painful. I don't understand it any better, the emotions are still messed up, and I still feel like I'm at square 1 in a lot of ways.
There is definitely something powerful in being able to tell your story. But it takes a really long time, especially if the abuse was chronic. And you can't just walk in, offload a traumatic event, and then "seeya next week for the healing to continue." It's a constant stop, start as you process and recover after each session.
Is your T onto something when she suggests you might need to talk about it? Sure. But there's no rush. Less than a year is really not very long for a process like that, because there's also a lot of work required that doesn't involve just getting it out there. I don't agree that it has to be detailed either. Talking about things in a general sense is a good way to gradually build your confidence (and ability to self-care through the process so you don't end up falling apart) and trust in your T. Plus some details will be far more emotionally significant than others.
There is no pass/fail when it comes to therapy. It's a fairly unique process for everyone, and it takes as long as you need it to. As long as your driving the therapy forward, it's a definite "pass". The way you're feeling about therapy though, the self-talk like "I'm failing", that should be something that your communicating to your T so you can work through those issues as they come up - left to run wild, those emotions can lead to depression or cause your therapy to stagnate as you become emotionally trapped by your thoughts about your theraoy session, rather than the trauma you're working through. Your T needs to know if her pressure is causing you distress.
What I would also suggest is perhaps working towards certain milestones so that you can feel a sense of achievement as you get through them. For me, I wanted to be able to get to a point where I was capable of being able to say certain things out loud, like "That was sexual abuse, he was sexually abusing me". It's mostly shame that stops me from being able to hear myself say those words to another living breathing person, and overcoming that shame, realising it's good for me to call it what it is out loud, was incredibly important for me. When I finally started saying it to my T, I knew I'd achieved something, and that felt good and reassured me that I was getting somewhere.
Just my experience.