hey i can relate to this i recently got tested and diagnosed at age 35 throughout school and for all of my adult life ive been told things like you have so much potential if only you would apply yourself why are you here if youre so smart etc i have always thought of myself as being pretty intelligent but with one lobe tied behind my back so to speak well part of the testing process was an iq test it was broken down into four parts i scored highly on the verbal comprehension and perceptual parts of the test 99th and 90th percentile respectively  on the other two parts the working memory and processing speed i scored far worse still above average but well below my other scores that difference the doctor explained to me is the source of much of the frustration i might be doing something working at a task and i know that i know it it know how to solve it but i can quite get there as fast i now that i should be able to it doesnt matter that all my scores are above average its the disparity that causes the anger my brain knows stuff but has trouble keeping up i personally compare it to npc walking speeds during escort quests in video games youre accustomed to a particular speed of movement so encountering a task that requires a different speed that you are then unable to maintain drives your crazy  anyway just having gone through the testing process and hearing this from the doctor couldnt help but think about it while reading this just knowing it has helped me hope something here resonates and helps you too