Media usually does it by weakening the Supers in the Normal's field.
Superman alone= Superman is smart
Superman and Batman in Justice League= Superman is super strong farmboy with laser eyes. Batman is genius at 18 things.
Who leads Teen Titans: Usually one of the nonsuper smart Robin. Aliens, robots, science accidents, and demigods = Morons who need to follow the smart and/or charismatic normie.
Or the Supers suck at tech or stealth or detection.
Or they do give them some limitation like "can't use guns".