My favorite Marvel movie is Captain America: The Winter Soldier.
There have been ten movies released by Marvel Studios since The Winter Solder came out. Those include two of my favorite comic book characters -- Spider-Man and The Black Panther -- getting intro movies, plus two great ensemble movies (Civil War and Infinity War, obviously, because Age of Ultron was a bit of a letdown) and the Guardians of the Galaxy movies.
It would be easy for me to say that any one of those movies is better than The Winter Soldier. When pressed, I might even pick one of those above over The Winter Soldier.