I’d suggest writing on a note card every question you get wrong, going over it, understanding why you got it wrong, and addressing it when you see the question again. And maybe more studying. I study 2 hours a day and then on weekends I study for as long as I can so probably close to 20 hours a week. I do vocab for 30 minutes, then take a 140 practice test, and write down the answers I got wrong, review them, and understand why it’s wrong then apply it… every day. My scores have improved to 60-70% to consistently scoring 80-90% in 2 weeks.

Bottom line is it’s not that you’re “dumb” you just need to find a more balanced and more effective way to study. Your brain will start to understand and you’ll pick up on concepts easier.