You see a lot of crooks and crooks still crook

In all else I've been an impostor, but not in that.

But be it so, I did not myself burden you. But, being crafty, I caught you with deception.

But be it so, I did not burden you nevertheless, being crafty, I caught you with guile.

How to get rid of him if he's doing a bad job or he's a crook?

Because your son, Sylvester is an irresponsible, unreliable, big loudmouth, nogood bum who, if he isn't a crook, it's only because he hasn't got the brains or ambition even to become a crook.

I've been an impostor for your sake, I'll not be one for my own.