How is Roderigo UNSUCCESSFUL because of his lack of knowledge?

Roderigo is pretty clueless about things. He is desperately in love with Desdemona yet remains ignorant about the politics behind the relationships around him: especially his own relationship with Iago. Iago pretends to work for Roderigo’s interests but is really furthering his master plan.Roderigo actually believes that Iago will be able to help him with Desdemona.

Now, my sick fool Roderigo,
Whom love hath turn'd almost the wrong side out (act 2 sc 3)