Lil Eazy-E: 'Straight Outta Compton' Reject -- NWA Movie Cast Would Outrage Dad

Lil Eazy-E thinks Ice Cube has BETRAYED the wishes of his former N.W.A. crew member by casting some no name to play Eazy-E rather than his own flesh and blood.

Lil Eazy tells TMZ ... his dad absolutely would have wanted him in the starring role. As Lil put it, "I am my father. I look like him. I sound like him."

And this part is especially galling to Eazy-E's son ... Ice Cube cast HIS own son O'Shea Jackson Jr. to play Cube. The way Lil Eazy sees it ... neither he nor O'Shea are seasoned actors, so why not cast both?

Dr. Dre's son is in the same boat ... he didn't get cast either.

Eazy-E died in 1995 after being diagnosed with AIDS.

Lil E is really disappointed, but in his dad's honor he's going to support the film and help promote it.