n of 2, this has been my experience as well. I was almost killed in a shooting in 2021, and in 2022 I started seeing a therapist. Going into therapy made me relate to my trauma more, think about my trauma more often, and self identify as a "traumatized individual". I don't think any of that helped. The only thing that really helped was daily meditation/mindfulness, which does the opposite - it teaches you that the thoughts and experiences you have are fleeting and rather than hold on to them you can let them go.
That being said, I don't think this is a strong enough phenomenon that it explains the rather large trends upwards in self harm/mental health. I think a good control is the graph that shows Schizophrenia - a 67% uptick shows that the diagnosis rates are probably a lot higher than the early 2000s, since I doubt that schizophrenia is really becoming more common due to social media.