You can sue a lawyer for malpractice. To establish a malpractice claim, in most states you will have to show that there was an attorney-client relationship, that the attorney acted negligently, and...
Unless you are going to small claims court, you can't. Courts aren't going to let an untrained individual without an understanding of the system and the laws and processes waste the time and...
If he needs one. There's a famous legal aphorism that "a lawyer who represents himself has a fool for a client." (Meaning: it's foolish to represent yourself; hire another lawyer to represent you.)