Most media is mediocre because the tastes are elevated at every possible point due to sheer amount of it. The more media there is, the more mediocre things there are. Dumb logic 101.
This is what's modern life is about. People are quacks all the time, and their facades in those shows is what they want to look like, hiding the unethical shit in their backs. What makes Akko the best is that she seen that facade, seen that rot behind her idol, and pushed further, carving her own path, even if that path was blocked by her idol, saving the magic in the process. That's the Dao.
Nobody blinded and nearly killed a cyclops, causing him to spend the next decade lost at sea all while his subjects tried to bed his wife, declaring themselves king.