There is a major issue with educational system. The problem is that it has gone down hill.
People after highschool believe that they are smart and maybe some really are, but mostly it is just an illusion made by the fact that you got some good grades and passed the finals.
The skill that I achieved only on university is the most important skill you can have - the skill to study.
Most people don't know how to do it and that is why they find school so hard.
The bad news is - nobody can teach you how. Only you can make It happen and after a lot of sleepless night things will start to change and you will start sucking up information.
So learn to study before it is too late or too hard and never quit school unless you have the million dollar 'apple' idea that will sustain you.