I have a similar thing where I lost my love for/ability to write creatively. For me the origin was a bit different - I had some strange experiences with multiple English teachers who like, identified me as a "gifted" kid and in need of extra attention, and then used me as a little ego-booster. They put additional pressure on me to perform that the other kids didn't get, assigned me extra/different assignments from the rest of the class, and then consistently singled me out as a "good example" in a way that made all my classmates despise me. I just wanted to be invisible, but if I didn't go along with what they wanted, or continue to produce the kind of work they had come to expect from me, they got horribly disappointed and took it as a personal insult to their teaching ability and thus to their very identity. I was just a kid, so I internalized that my inability to meet these distorted expectations was literally harming the adults in my life.
It was strange and bad and scary. I was already being abused at home and the extra bullying did not help. In the end it made me so anxious about writing anything and having it be seen by others. I used to have panic attacks about writing ordinary essays. I have gone many years without writing anything for fun, when it was my childhood dream to be an author.
But this isn't the kind of thing that most people think of as capital-T trauma, so I put off addressing my feelings about it for a long time. I'm still working through it today - I haven't fully reclaimed my creativity yet. But I have made very meaningful progress and it's given me a lot of hope. The key for me was addressing it in the way I addressed my other sources of childhood trauma. For me, that's been trauma therapy but also breathwork, somatic techniques, and the use of entheogens in community.
Aside from trauma healing, I've also tried some clever ways to be creative while circumventing my fear of writing. One of these is solo TTRPGs. They are a great way to experience a story of your own making, building up characters and a complex world, without any expectation to write it out and show it to others.
The other strategy I've been using is to write in another language. I use toki pona, mostly because I have pretty severe cognitive impairment from long covid, and so it was the only language I felt I could reasonably achieve fluency in. Writing in not-English is like using a room in my head where all the other trauma never happened.
Possibly these specific workarounds won't work for you, but maybe they will give you some ideas of other creative ways you can circumvent the anxiety response you currently have. I think of my creativity as something like an injured kitten, who needs to be gently coaxed to trust me again. Anything I can do to get her playing is a step in the right direction.
How feasible would it be for me to watch and avoid looking at the gore? Like is it random for shock value, or is it in scenes where I could reasonably guess that gore will appear and look away from the screen for a while?
I ask because I have this fun kind of mirror synesthesia where if I see people being hurt, my brain will occasionally decide to simulate the pain for me on the same body part, and it gets stuck like that for 15-20 minutes before fading. It can make shows really uncomfortable to watch.