I being kind of let down with this movie the first time I watched it, and I definitely still feel like it has problems, but man this movie was pretty damn good! The time travel gimmick wasn't too horrible, the Quantum Realm is sufficiently set-up so it doesn't feel like too much of a random convenience.
Unlike Infinity War, I find that the central heroes have a lot more going on emotionally than Thanos does in this one, which…