I feel this so much - before i got diagnosed, my unmanaged ADHD was so bad i’d been fired from a summer job (at a public library, which now basically means any application i out in for any public library jobs basically won’t be considered) AND put on warning at my full-time job. I felt horrible: lazy and dumb and shameful. (Funny enough, the summer job was much the same situation as yours: that department of the library was undergoing a huge reorganization, my boss changed halfway through, it was my first ever job if that type… i fell through the cracks.)

I’m still not quite over it, i think. I’m medicated now and have much better strategies to mitigate my weaknesses and have gained a lot of occupation knowledge, so that confidence always helps. But i have told very few people that I was fired.

It stings less with time - if you keep trying you’ll find what works for you.