I'm going to take your comment in good faith and assume you are just frustrated with the system.
I don't live in the US, my experience comes from the Netherlands.
I was having hard time dealling with the Covid period, and was having lots of anxiety regarding my work and proeutivy so I reached out to my GP. Talked and had sessions with 2 different psycologists over a year, both suggested to ask a referral to an ADHD specific clinic.
Since I did not want medication I never followed through. Fast forward a few years I reached out to a GP because I was thinking the ADHD "assesment" was correct. Followed up with another GP, they were super kind took my ADHD concerns seriously specially since I wanted to avoid medication first. Got referred to a psicology practice that followed me for 8 weeks, after they they also gave insurance a note that it was possible ADHD and followed me up with a different referal to a different clinic more specialized again.
So no I don't have an ADHD "certificate" to hang on the wall, but I have talked with enough professionals that think that might be the case.