Everyone cheered when they were given the water and found out Immortan was dead. I'm pretty sure they wouldn't have been happy he was decapitated if he wasn't a tyrant.
Hating him and liking free stuff doesn't require that he was unreasonable. It requires either a certain culture or some peculiar PR decisions, but he could have been a complete jackass without having access to free infinite everything that he just didn't feel like sharing.
Max accidentally stopped a crossbow bolt from killing him using his hand, that was pretty awesome. There was that really cool fight between him and Furiosa where he was handcuffed the entire time. There was the early chase right after he was captured when he broke out, beat up a bunch of dudes, jumped onto that hook and was then fairly recaptured because the mooks aren't incompetent. He did this, that was cool. He was on the hood of the war rig spitting gas into the intake. He was jumping on cars and killing and throwing people and he blew up the bullet farmer off-screen.
Did we even watch the same movie? Because I remember a movie that was packed with some killer and for once literally non-stop action.
Oh, sure, there was stuff going on
all the time. But in terms of specific, exceptional acts of badassery, I was having trouble thinking of anything.
The crossbow thing was a great example of just that, and had the extra advantage of reminding us yet again that Max is literally insane.
The way I read Immortan Joe, everything he does is about control. His outfit is about continuing to look strong even though he's a dying old man, his whole faux-Norse religion is designed to keep his warboys fanatically loyal to him. Which you'll notice, none of the movers and shakers in his organization actually seem to be believers. Just the grunts. His Citadel says "I'm huge and imposing and you'll never get rid of me" in the same way that a medieval castle must have. And of course the water gives him control over the population.
That's why he can't let the wives get away. He can't allow any dissent or weakness; the whole thing is too high-profile for him to look the other way. Not that he WANTS to, but even if he did. Can't let his wives and a traitor embarrass him.
I felt like he had plenty of personal motivation for the wife thing, but this does seem likely in general.
Not to mention the very first thing they do is turn loose the spigot on the water reserve. I'd love to see the followup where everyone's shocked to find out Immortan Joe was rationing out the water because the shit is actually scarce.
Then again, I fall in the 'Endor Apocalypse' camp of happy-ending-cynicism.
I can dig that. A victory that's too clean usually feels contrived and undeserved. Doubly so for post-apocalyptic stuff, which Fury Road seems to have mostly blessedly realized.
Though on that note, I do feel like the wives got off
really fucking clean. Only one died, and while we don't
know that they're going to continue to be pesudo-royalty for no particular reason, the new boss felt like transporting them to paradise would atone for her constant and relentless murder. Pretty good spot for not a lot of effort, risk, or talent.