The problem is they downplay the other characters' unique talents. Batman is never the detective who figures out shyt nobody else can and comes up with tactical master plans. Flash ain't a forensics cop in this so they don't use his scientific knowledge, or the flexibility of his talents beyond running and hitting fast (think vibrating through mass, creating vacuums, etc.), Wonder Woman is never shown to be the best hand-to-hand combatant they have as well as a perfect all-rounder who, unlike Supes, can handle magic and mystical elements and Aquaman, well, they never did anything interesting with Aquaman because they were too busy to make him look like a tough guy.