I think you simply didn't read the text on screen. Also Phineas is nothing like Rick from Rick and Morty, for starters Phineas' main character trait is being idealistic and hopeful which is the complete opposite of a Rick Sanchez type of character, and even in his ending you have to do really terrible things if you want his plan to succeed, like when you have to remove the entirety of the unthawing component from the Board's cryogenic experiments which makes all the test subjects die painful deaths that you see all the way through leaving it.
The Board are not like the Enclave really, the reason yo would have to side with them is the same as siding with the Legion, the promise of authoritrianism being preferable to the anarchy that ensues with the alternative, you can even choose to spare the director to have him manage things for you which characters show approval of with the exception of his son who is part of the Iconoclast cult which are presented as actually far more destructive to their set location than the milquetoast Sanjay, in fact killing the leader of the Iconoclasts and have their forces surrender to Sanjay is the better ending.
If you saw no humor I don't know what to tell you, are you just humorless? Also they were liek Futurama but nothing like Rick and Morty, I don't get why you keep comparing it to Rick and Morty, is it because there is an old guy scientist? He is more of a reference to Doc Brown, you know the guy who Rick is parodying? Did you actually play the game?
Regarding Phineas, you are basically reinforcing my point about him being essentially Rick Sanchez without the negatives. Stripping away the moral nihilism of Rick only makes him a less conflicted and less interesting character and further reinforces the lack of reasons for ever picking the side of The Board. The fate of the other guys that were in cryo-sleep in the ship is just another contrived thing that Obsidian added in a failed attempt to balance out the two sides, but it falls flat due to the fact that it is a completely reasonable and justified action given the alternatives, and it's not like the frozen colonists ever play a role in the story or are made in any other way relevant if you don't pick Phinea's side anyway.
I don't agree with the idea that siding with The Board is anywhere similar to siding with Caesar's Legion at all. Even in despite of all the rushed manner that Obsidian was forced to produce FNV and all the cuts they had to make regarding Legion content, they still managed to include enough content to show glimpses of the Legion in a positive manner; they are shown to enforce peace and order within their territories and completely eradicate all raiders and gangs, they are well disciplined, well organized, fierce, just, cunning, brave, etc... Whereas in TOW almost all content shows The Board in an ultra-dystopian manner, every other conversation with NPCs is some story about how you have to pay a tax if your friend commits suicide, every computer terminal is another story about another way in which the employees are enslaved and abused, every new area is filled with more ways in which The Board completely failed at achieving even the most basic measures of success in maintaining order and control over their colonies. In order to be anything at all like The Board, Caesar's Legion would also have to have exactly all of the flaws the NCR has: Widespread corruption and incompetence.
Even at the point where the game tries the hardest and most repeatedly to coy players into centrism, I still picked the side of the hardcore Iconoclasts and slaughtered all of the moderates without even blinking because the idea of appeasing or negotiating with The Board was completely pointless since they are purely evil and incompetent. I'm not going to side with Jeff Bezos if on top of forcing employees to piss on bottles and shit on bags, they also delayed my same-day-delivery by 3 weeks and accidentally got my order of aspirin mixed up with the order for chemical castration pills.
As for the humour, no, I hardly saw any. The story of the game is completely played straight and there is not really any sense of irony like you would find in something like Bullestorm. There are some
attempts at humour such as the line for one of the gun ads that repeats "You have tried the best, now try the rest" ad nauseum, but that wasn't really funny. There is also the aesthetics of a comedy show (i.e. the game looks like Futurama visually), but like I said; dressing yourself in a clown's suit without cracking any jokes is not the same thing as being a clown. I only remember one particular joke that actually got a good chuckle out me when I found out that a squad's medic had a shotgun that was called "Euthanasia Kit", but other than that I found the sense of irony of the game to be absent.