Soldato
seems to happen with most games to me nowadays
If you don't think about the outpost/village/base complete percentage and just have fun blowing stuff up it's a lot of fun. Just don't let the completion statistics lure you into doing what you don't find fun. Get a tank or chopper and just go to hell on a settlement all guns blazing. If you download a mod that increases the grapple length you can move at tremendous speeds by opening the chute and grappling the ground, pulling yourself forwards, which is a fast and very fun way of moving from outpost to outpost.
The gameplay might not be for everyone, but if you play it for the story or to 100% each village you get to, you're going to get bored very quickly.