The genre is always a problem. Take the Dumb Superman problem. Superman, and many of his super villains, are immune to any mundane harm. So what do we see in a Superman media? The bad guy picks up an truck and hits Superman with it and Superman flies backwards, through three buildings, and then just gets up like nothing happened. It is SUCH A WASTE OF TIME.When you get into Tier 4 and 5, there really aren't a lot of good examples in genre fiction or in the game. Which rolls back around to the problem of what to do with non-casters at that point. There's all sorts of parts contributing to the problem.
Then you get the Power problem. Take Thantos. By the start of Infinity War he could defeat the Avengers with just a pinky finger wiggle. Why does he not do this. One wiggle and they all turn into bubbles: Remember how easily he took out the Guardians of the Galaxy?
Or like the end of X-Men The Last Stand. As soon as the X-Men show up....Magento could have EASILY sent both Colossus and Wolverine to Mexico or way out into the Pacific Ocean. But he does not.