The poor ending was entirely due to the hubris of Dumb and Dumber who were greedily looking ahead to their next projects. HBO was willing to give them as many seasons as they wanted after season 6 and they said, "Nah, we can do it in two seasons. And instead of ten episodes each they’ll have 7 and 6 episodes because “Fuck You”. They could have handed it off to someone passionate if they were bored, but again, hubris.
Hey republicans, running batshit insane black people on the Republican ticket isn’t going to work, because black people aren’t morons who are going to vote for self hating, self described “black nazi’s” just because they’re black. Pass it on. Or don’t. It’s hilarious watching you make this mistake over and over.