Definitely an Adult cartoon. Great plot situations. Discovered the show too late. In an apocalyptic world, two brothers that are not mutated survive in a makeshift town with other humans who have mutated in some various ways. Their mother apparently was trapped in a bunker. The mom is being held captive by an AI computer. Mom wants to escape the bunker and find her boys. The AI becomes infatuated with the mother while the mother is constantly trying to trick the computer to let her escape.
The two brothers are like typical teenagers but have become men and are comically maturing at slow intervals and want to find their mother while surviving and getting sidetracked.
The first season explains how the apocalypse started at some point. Most mysteries will be concluded except for a decent finale. So unfortunate that this was canceled.