Have you noticed , How the cleverest people at school are not those who make it in life ???
What you learn at school are fact , just KNOWN Fact !! Not the basic of life.
Some people dont have great mark, good achievement @school , it doesnt mean they are stupid. It means their imagination has not fired up by the academic tuition.
So people can be succesfull it depend on your social life. As long as the goal is there, there is no limit to anyone's achievement. so grab it and crave your future !