You played a Fallout game without trying every single path? I mean, sure, Fo4 hardly has any real choices compared to past games, but still.
Here are the basics: You go with group A, B, C or D and kill or don't kill group B/C and then nuke group D unless you are group D. If you're group D you kill groups B and C and police the commonwealth.
Sure, there are small differences like Liberty Prime that add a small amount of flavor, but it's hard to overlook that every choice is generalized besides the Institite one. They're not made to reflect the actual factions and their goals.
If you know about what the BoS actually are, then the moment anyone said anything about nuking the Institute you'd start shaking your head. The BoS is all about taking technology from others and using it themselves. They've never been about preventing tech from running amok, they're about saying bs to get tech from others, so they can use it and run amok with it themselves. They'd sooner kill/capture Institute scientists and make use of their resources as a base of operations than blow the place up.
The Railroad's goal makes sense, since they have an actual reason to blow the place up: to stop the production and enslavement of synths.
The Minutemen are a whole different level of weird. You'd think their ending would be more focused on taking out the Gunners and diplomatically resolving things with the Institute, but nope.
This is Fallout 4's largest problem: the writing and scenarios don't make sense in context with the lore from past games, or the lore in the game itself. The writing, simply put, is atrocious for a choice based RPG.