Thor and Thor Dark World were boring. Heck Thor as a character has always felt lame to me. It doesn’t make much sense, as I love Norse Mythology, but as a superhero Thor is a dumb idea.
Then Thor Ragnarok rose from Niflheim and showed us that not only could Thor and his brood be interesting, but also so much fun! This is without a doubt one of the best MCU films, Black Panther and Guardians 1 & 2 notwithstanding.