Why Doesn't James Like the Avengers Movies? (No Endgame Spoilers)

With Endgame finally here, we decided on a spoiler free reflection on the Marvel Cinematic Universe (MCU) as a whole. But, why does James only like the individual Marvel movies and not The Avengers? Kieran certainly does. Justin barely cares about anything, but he likes the Avengers. There's been 21 movies over a decade, it's basically the Star Wars of this generation.