I can relate 100%. It affects how I perform in coding interviews, and I also need to work around it in my job.

I also have ADHD and a lot of this matches Dr Russell A Barkley's description of ADHD, particularly when he describes it as a performance and executive function disorder - https://www.youtube.com/playlist?list=PLzBixSjmbc8eFl6UX5_wW.... ADHD includes much more but this "slow thinking" seems to be a prominent feature.