You're not lazy, you're not stupid, and you're not a loser.
You just have ADHD, and once you figure that out things will get much, much easier.
Hang in there.
Pretty sure a 3rd grader could figure out that "riggers" sounds a whole lot like a really naughty word for black people, which is about where he's at mentally.
Are you suggesting he's incapable of those things? What is this comment even supposed to mean?