What to do if you genuinely are dumb?

So every thread has the same answer "you're not dumb it's your teacher's fault / you're not dumb it's your learning style doesn't match your teacher / you're not dumb just get tutoring / you're not dumb just care then do your homework by yourself." <br>What if it's not any of those? I'm short answer genuinely dumb. A 4th grader could do my grade's stuff easier than me. I'm not an abnormal case even, everyone is in the same situation as me. We've had the same teacher for 3 years and the last year he used to genuinely go though every single thing with us but the current year, nothing is being taught. We are supposed to do everything by ourselves now. Haha. My grades were already terrible so in our country I only have 2 years left to get my shit together but I'm in a truly terrible position. Please give me advice, not the "you're not dumb" lines please.<br>It's not only my grades that are trash. I'm truly dumb. I can't even answer my friends questions. I don't understand jokes. I am dumber than genuinely most kids.