So true and fun to read.
For some unknown reason, tradition states that the first movie must consist largely of something no one in the audience paid to see: The superhero as he lived before he could do any cool superhero stuff.
Other genres don't feel the need to do this; Die Hard didn't spend the first half of the movie with John McClane taking target practice, Rambo didn't spend an hour showing Rambo in basic training. Why can't we just jump in?
Instead we have to watch Peter Parker struggling as a photographer, and Bruce Banner quietly working as a scientist, as if we must first appreciate the tedium of their regular lives before we get to see them jump off an exploding building.
And to double the problem, they usually throw in an origin story for one or more of the villains, too. Behold! Here is the awesome badass supervillain, back when he was just a disgruntled dude in a lab coat!