So, a rich guy with no class who clowns himself by trying to schmooze and suck up to people in order to make business connections? Gee, where have we seen that before?
Honestly, this is not unsurprising or unrealistic. "Rich" doesn't mean you have to have class and be smooth at networking. Lots of rich people, mostly those in the nouveau riche category, are completely classless and tacky and tend to lack the sense of refinement and tact of those who come from old money. So Sage's Dad might be rich, but that doesn't stop him being an embarassing buffoon who gets on people's nerves with his brash attitude.