Well, I'll add more autism to FC5 ending discussion. I think, it's just a progression of previous games' themes of nonresistance to evil and survival, which didn't work well together. And yeah, all games from 3 to 5 had terrible endings.
What do we have in the third? If you decide to leave this shithole and leave your friends alive, that nigga will try to stab you. I repeat, this nigga, who knows, that you single handedly destroyed an army with all sorts of heavy weaponry and become an avatar of Moonman, tries to fucking stab you. And he is so fucking bad at it, that he kills Citra instead. And then, without any meaningful conclusion, they just show the beach and credits roll. The only thing this scene misses is this:
Ok, but what about the other ending? Well, Citra offers you to kill your friends "to cut ties with your past life". Ok, why can't I just let them go? Because game implies, that they are bad people? Why? Because one of them watches porn and other had speeding fine? I should slit their throats, because they are stereotypical rich kids? Ok, let's pretend it is not retarded. You kill them, fuck Citra and she kills you right after that, because
she no need no man, yo, only child allowance your child will be the new ruler of this place. Bitch, your islands have all sorts of drug plantations, slaves and even fucking petroleum. Do you really think other drug lords won't try to take over them, before you'll even feel the baby kicking? Or even that friendzoned nigga, that kills you in the other ending. Why are you so sure, that this kid is going to be great warrior? Brody has been taking all kinds of drugs during the game, do you really think it's good for the kid? Shit, are you even sure that you got pregnant after one time?
But despite all of this, the first ending kinda works. Through all the game Brody was a doormat, even when he started local genocide. He mostly just followed orders from other people, who tried to use him, but this time he makes the decision out of his own will. He's survived, he can stand for himself now. But in the same time it shows, that there were no good side. This place is a shithole, nobody has humble intensions and the best option for you is to leave it like this and help yourself.
The same thing in the fourth. No matter who you choose, Kyrat will remain shithole and Pagan was right, when he told, that his death isn't going to change anything. But that's where the secret ending works. This is not your war, you've come here to fulfill the last will of your mother, just do it and leave.
And in fifth it just reaches apogee. The old "all sides are bad" doesn't work, because game is not taking place in some remote shithole without police and any kind of authority, so we left with "Joseph was right". Why? In the ending, where you let him go in the end, it's heavily implied, that there won't be nuclear explosion. So basically Joseph was the prophet all this time, but if you let him prepare for the end of the world, this end just isn't going to happen? It is old nonresistance to evil, but it just doesn't work when there is clearly a good side in this conflict. But what with the secret ending? It doesn't work at all, because apprehending Seed IS what you've come for. It is your final goal, you are not some tourist, you are a cop. It would've worked, if this secret ending was to kill Seed right there, therefore giving up to wrath or pride or whatever and showing, that he is mere human being. But they just took old ideas and slapped them on the wrong setting and because of New Dawn nuclear explosion can't be interpreted as just a hallucination. Thanks, Ubisoft.