Yeah... but then there's that sense of accomplishment, at the end. When everything works right, like poetry in motion. There is nothing quite like getting a few dozen people, all working together in unison, your hours of work finally paying off, as you clash in an epic battle with these truly titanic opponents.
I mean, one of my favorite fights... after fighting off three waves of insanely powerful minions, including a wave of animated weapons that, after being beaten, you can pick up and wield, the boss himself, this big, bad guy, whose influence you've felt throughout the entire region, the hours upon hours of quests it took to get to the point you could fight him... he finally steps out, halfway through the fight, truly majestic. Then, just when he starts losing, he basically says, "fuck you," walks casually to the middle of the room, despite getting pounded on, then channels all of the power he's been stealing from the earth around his fortress into himself, rises up into the air, blows the roof off the building, then sends your entire party into the air along with him, to continue this fight, almost in space.
And beating him doesn't end the story. When you finish, he appears in the sky over the capital city, threatening doom and destruction to everyone, then flees to a second base, elsewhere, where you can go to finish the battle, at a later date.
Blah, I know, it probably doesn't sound as cool as it looks, but it's definitely something else, and worth the hundreds of hours of time invested to see.