I thought about this after a friend of mine (barely graduated High School and forgets almost everything even after weeks or months of studying) got tested both his IQ and his overall mental health being.

Turned out his IQ is 115 and he had ADHD.

Thing is when you study A LOT but fail most stuff, you are probably not low IQ (cause with an actual low IQ of 85 you wouldn't even be able to function in your day to day life accordingly), cause even someone with low IQ but who workd hard gets stuff given the time he puts in, but you might aswell should do some sort of psychotherapy or neuronal scan to check if you have a untreated mental disadvantage.

My friend is 28 and only now he goes forward with education thanks to treatment, so I advertise it for most Anons in their early 20s who didn't receive any kind of treatment to look into that stuff.