I get this. Loved Tri and Freedom Unite, played a decent amount of 4, some of World, and barely started Rise.
They're always exciting, and I don't dislike any of the games, but it's just a lot to get going, really invest the time, and get the value out of these.
That's why I love the MH series - plenty of value, even just solo'ing it. I'm still trying to finish up World, doing everything I want to do. Unfortunately I have to put a lot of time into these games to "git gud" lol. And of course at the same time, real life responsibilities calls. xD Not quite ready to move on just yet!