Anyone constantly feel stupid?

I’ve been recently diagnosed with ADHD. My whole life, everyone including myself thought of me as somewhat intelligent as I’ve done well academically and have common sense.

However, I feel extremely stupid ALL THE TIME to the point where I am questioning my whole existence.

I can’t remember anything, focus more than 10 seconds, I don’t have interests or hobbies, I struggle with social interactions, I can’t process what people are saying to me when spoken to, I can’t read as I instantly forget, I am always late, I can’t plan anything, I struggle to meet deadlines, bad driver, I can’t see details. I could go on for hours.

I am conscious it’s probably ADHD related but wondering if I am genuinely stupid and just blame ADHD on my incompetence!