The animation is pretty nice and the gore was awesome, but this was not a comedy. It was a psychological horror story made to look like a parody.
The music was great and the action could be quite cool, but the characters were just incredibly unlikable. And this isn't like Archer or Rick and Morty, because Archer is a dick to everyone but isn't a heartless monster. He has compassion and is called out on being a dick. Rick has Morty to nag him into not being as terrible and he's at least detached. He doesn't actively go seeking to inflict pain on everything. He does that a lot, but he still at least somewhat cares for Morty. What we saw here were 2 sociopathic slavers torturing their slave and finally killing him, as well as killing countless innocents gruesomely. You went out of your way to make them as unlikable as possible to make the humor dark, but you forgot to give them redeeming qualities. There was some humor in how they're kinda losers, but that was really off-putting. The voice acting for Elvis also seemes kinda off at times, and the action in the temple was weird, all of a sudden Elvis was separated from the goblin, whrn a moment ago he was getting crushed by him. The backstory at the start was very funny and built up a world where this sort of thing could work. I agree with @thesemichrist, this reminded me of Starbarians, but the Starbarians weren't torturing a slave constantly (at least not in the first one, haven't seen the second yet). They overkilled a villain and took everything from a king, kidnapped a girl. They still weren't overly hostile to anyone for absolutely no reason. They did things for personal gain, not because they wanted to be evil.
High production quality for the most part, but the characters and story were so off-putting it was hard to watch.