It's actually one of the better done superhero films with many punchlines and emotional depth. The focus is on the mundaneness in one's daily life and how it doesn't escape you when you are a superhero -- you have to deal with it, without your superpowers, as a human being. Mending trauma, overcoming your weaknesses, embracing love, and growing up.
I got up early today. It was still dark. I went down by the side of the loch. I saw the sun come up over the sea and the birds out flying. And I thought about how beautiful this world is. And how much I miss it when I'm under the water. And then I thought of you.