Yeah, I get what you're saying about it feeling too easy, but @felixb25 nailed it with that "her own victory" bit. The thing is, I've seen movies where the hero dies and it feels earned, but here Furiosa walking away actually stuck with me more because it showed she wasn't just a tool for Max to use up and toss aside. It made me think of how sometimes the bravest ending isn't a big explosion, it's just getting to live your life on your own terms.