Ah, no. While I'm sure that is a problem with many kids, mine was lazy. Keep in mind, he would get A's and B's on tests. He brought home homework and would lie and say he had none so he could play instead. He would do it, and do it correctly, if you forced him to do it...then he would leave it home or simply not turn it in. Or he would do math, get the right answer, but refuse to show his work...because "all the teacher should care about is that he got the answer right." He'd have an F at midterm, then bring it up to a C or even a B by end of term once he got in trouble. Early, he was just bored, because he already knew the stuff they we're teaching. Later, he just didn't want to do the work, whether too easy or not."If he'd tried"... If I had a dollar for every time I heard that - about myself, or about my kids - I would be rich. That's what it LOOKS like... as though they are not trying. In reality? You don't know what all was holding him back. I found out stuff - simple SIMPLE stuff that should have been caught at grade 3, and we didn't know until high school - that explained a LOT of why school wasn't easy and why he wasn't just "lazy". Part of him had/has the capability of doing academics. But when you also have to survive in life... there may not be enough mental and emotional energy to excel.
And as for biodad, I meant that he wasn't there to be compared to. You wouldn't think thinking badly of himself would have any genetic component, as opposed to an example.