Comment by jltsiren

Frodo is determined and reasonably competent, but he ultimately fails his quest. In the end, Frodo is not strong enough to let the Ring go, but he instead claims it as his own. Middle-earth is only saved, because Frodo decided to spare Gollum earlier. Gollum proves treacherous yet again, fights for the Ring, wins, and falls to his doom.

When the hobbits return home, Merry and Pippin (and to lesser extent Sam) are the ones leading the liberation of Shire. Frodo has been traumatized by his experiences and no longer wants to see any violence, no matter the cause. But he cannot adjust to civilian life either. He is invited to live in Valinor. Not as much as an honor, but because his involvement with the One Ring has made him a relic of the past, like the elves. Middle-earth is no longer a place for him.