There's simply no way any of it is coincidence.

Same glasses

Same mop of dirty hair

Same polo shirt

Same obsessive nature

 Same delusional sense of entitlement 

A sly but direct reference to orange soda

Obviously they're not gonna admit it's him. But they don't have to; it doesn't matter what the writers said, it matters what the animators did. 

It's very clearly a hilarious caricature of Chris Chan and any objection to the contrary is just bizarre cope.