Getting help with the dyslexia could turn things around. It sounds like he thinks he’s not smart enough because he’s behind in reading, but knowing it’s a learning disability and there are ways to work around it may help him. There’s a fantastic free service for those with disabilities called Bookshare (bookshare.org). They provide books with read aloud and highlight in sync functions. There are many, many audio books now too. And I think Google offers some read aloud functions as well.
Maybe he could finish his GED with these types of accommodations and assistance?
Don’t give up hope. Help him discover the things he’s good at to build confidence, which will build the strength to tackle the hard stuff.
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism