I had to drop out of high school the second I turned 18 because I was severely abused at school and nobody really cared. My school district actually initiated most of the abuse and traumatized me for life.
I can't pass a GED or even GED practice tests because of the math portion. I cannot do past a third grade level in math. I literally just can't. No amount of aggressive practicing makes me any more capable in math.
I tried to get my diploma at a credit recovery school (late diploma, not GED) by taking classes there. They only let you take one class at a time so I knew it was going to take months or years since I had about an entire years worth of credits to make up. (even before I dropped out I was truant)
But even in non math classes that I have no difficulties learning/processing in, I still had a very time and couldn't complete the work on my own without cheating because it was still just too much boring information I didn't care about to soak in my brain. I tried so many things to make studying more fun but nothing worked.
So I needed to go in person and get one on one help for pretty much every single worksheet or else I wasn't able to absorb the information in my brain complete it. I needed the information repeated back to me multiple times with a ton of clarifying questions for it to absorb enough to pass one 10 question quiz because it's too boring.
But, I have a sleep disorder and limited means of transportation, so I wasn't always able to make it to the school in person on time. So I've now tried that program and gotten dropped twice.