Superhero films kindof kill the tension. Superheros always win, and the suspension of disbelief is heavily established for the superpowers. The tension of a possible failure by the heroes is lost.
Helps if one isn't too familiar with the source material. With my Marvel experience prior to MCU limited to a bunch of animated shows I watched as a kid, I left the cinema furious after watching Captain America: Civil War - I was pissed at them showcasing and then destroying S.H.I.E.L.D., the one thing I actually found most interesting in the whole setting. It was a moment of genuine, deep surprise, as I had no idea how they planned to recover from losing - what I believed to be - a critical piece of the setting.
Couple more MCU movies and now I know better how this genre works :).
Couple more MCU movies and now I know better how this genre works :).