I guess for once I'm gonna have to be a troll and say I never really liked Venture Bros. Not one bit. I just don't think it's that funny. To me, laughing at Venture Bros. is like laughing at a kid with Down Syndrome when they do or say something stupid. Sure, it might be somewhat funny, but at what cost? Maybe I'm missing something, but it seems like all the jokes are "Oh look, Brock used WAAAAAAAAAAY more force than was necessary to defeat the bad guys. And Dean and Hank are really naive about how the world works! Oh, and Dr. Girlfriend is really hot-looking, but her voice sounds like a man's voice! And the Monarch is a really incompetent bad guy!" Did I miss anything?
First of all, you're not a troll for expressing an unpopular opinion. (Unless you're a douche about it, like a certain hemmorhoid who will remain nameless...) We still love you, Dalty, even if you're completely backassward wrong.

Anyway, you seem to be missing the point. True, what you've pointed out about the show isn't particularly funny, not anymore funny than, say, Homer Simpson being a complete bumbling idiot, or Bender being a vice-ridden robot. It's the way the characters interact with each other, how they react to situations, and the absurd fusion of Johnny Quest-style action with modern geek attitudes that's funny. For example, here's one of my favorite moments from the episode "Fallen Arches." Dr Orpheus has reassembled his old superteam the Order of the Triad to audition prospective archnemeses:
Jefferson Twilight, Blacula Hunter: On three we give him the old Rochambeau.
The Alchemist: Rock-paper-scissors?
Dr Orpheus: What does a general from the American Revolution have to do with this?
Jefferson Twilight: American Revolution? Rochambeau sounds French to me.
Dr Orpheus: Yes, the Franco-American forces.
Jefferson Twilight: They fought with Spaghettios and meatballs?
The Alchemist: Why would a company called Franco-American make Italian food?
But hey, there's no more subjective question than
What's funny and why?