Frodo didn't complete his task. Sam literally carried him up Mount Doom. And when he got to the end, he couldn't throw the Ring away.
But for Gollum biting it off with his finger, it wouldn't have been destroyed.
So Frodo's journey saved the world nonetheless.
It was too much for him to bear. He could no longer live in the Shire or live in Middle-Earth. He wasn't of the world anymore. He had to go to the Undying Lands.
He took on the task that no one else would. He saved the world. Everyone got a happy ending. Aragorn became King, Sam rebuilt the Shire, Merry and Pippin became heroes. They all lived in renown.
But Frodo had the hardest task of all. No one else would do it. A simple hobbit who came by the Ring by chance. Not a King, not an immortal. Not a wizard. No power save his will and his friends. And he did it and saved everyone.
And he never got to rest. He never got to remain in peace. The task destroyed him. It was too much.
But there was no other way. Nobody but a simple hobbit could bear the ring all the way to Mount Doom and resist its power so long. Not a man, not an elf, not a wizard; they would have succumbed. Gandalf knew this, which was why he chose the hobbits in all his designs.
It's amazing that one of the precedent setting works in the fantasy genre holds up so well because it subverts what ultimately became the genre's core tropes. The hero was not the King, or a chosen one. In fact, the hero not being the King was a key point that allowed Aragorn to distract Sauron and allow the task in the first place. The hero was someone unassuming but courageous, who did the thing because no one else would, even though it was just by chance he came upon it.
But Frodo couldn't resist the Ring completely. He wasn't superior to anyone else in that way. And in the end it left him broken. The burden crushed him. No one else could do it, and in the end, he couldn't either. He wasn't so special that he was invulnerable.
I'm not okay. Holy fuck you guys.