I really think that you're being WAY too hard on yourself here.
This was a genuinely well written and funny cartoon. Comedy is notoriously hard to nail down but you've manages to write likable characters and give them great lines and a relationship and manage to juggle some hard sci-fi into the mix as well! That is no small feat!
It's funny that you mention Rick and Morty in your comments because I got that vibe while watching.
The fact that you're just one guy writing this is incredible; I think that hating this cartoon because you don't feel it's up to R&M standards is really flagellating yourself to the point being unrealistic.
I'm always envious of good writers because whenever I've tried reading back my scripted comedy my balls wince with embarrassment. If I could write something half as good as this I think I'd have an aneurysm.
It's such a shame you felt like throwing in the towel on this one; even as a storyboard I was chuckling away and hoping for endless sequels!
My suggestion, for what it's worth (probably not much as I'm just some twat on the internet) would be to finish this off and re-submit it. It is such a shame to see so much potential unfulfilled.
Cons.
1). Maybe lose *some* of the reverb on Brobot's voice, just to help the gags hit harder.
Pros:
1). Great writing.
2). Genuinely funny and likable characters (Yes, even Milo!).
3). Lovely voice acting.
I've subscribed and looking to seeing more of your work in the future.
:D