I believe that is the 'fake it till you make it' kind of mindset, but in a more controlled aspect.
I have thought of doing persona adoption as a technique even. As there are proven tests where it has improved the subjects interactions similar to "code-switching," where people adapt their language, tone, and behavior based on the social or professional context. The strategy has roots in psychology, specifically "role theory". Similar to the idea that a retail worker adopts their 'professional mindset'.
If I'm honest, there is self annoyance, as in angry at myself for the mistake I have made, due to ADHD medication, I can focus more, so I spiral more effectively, but I can also kind of separate from the thoughts thinking 'that's the old job, you're in the new one, it's okay to make mistakes' so far that has helped. Without the focus I used to become emotionally numb, which helped in a negative aspect, as I could just do the tasks albeit in a autonomous fashion, but that was years ago, I've since come further from that.
I also find audiobooks help, especially philosophers, as they tend to look at life in a different lenses, which helps me by separating from the direct issues and applying an abstract lens to it.
As another person said in that session, cutting negative people out helps, and I've slowly been able to come to grips with the idea that it is okay to not have relationships with those kinds of people. All relationships have an expiry. 🙂
I'm only now able to start slowly on trauma related experiences some 28 years after it. All things take time.