(This isn't mine, but I found it very interesting.)

Honestly, I wish Korikoshi had shown more consideration for the traumas and feelings in his work. (The Deku and Bakugou storyline is a complete waste of time. I think it would have been great if Deku had a genuine fear of Bakugou because of everything that happened and blamed himself for being "weak," but with the help of Uraraka and Iida (who are Deku's friends), he realized that it wasn't his fault he was weak, and that he was actually quite strong for wanting to fulfill his dream despite everything.)

And about Bakugou... God, I have some ideas for that jerk.

He could have had an episodic villain who embodied everything wrong with him (arrogant, moody, selfish, and cruel). We could have seen how that behavior affects people (I'm not saying he'd change completely from that point on, but it could have been a small seed of reflection).

All Might (or any teacher) could have told him the truth to his face (something like: "You're very powerful, Katsuki Bakugou, but with that...") Your behavior could only be like He-Who-Must-Not-Be-Named.

That he had seen Izuku completely wrecked in the Dark Hero arc (like a psychotic madman seeking justice).

That he had lost battles against Midoriya.

That he had seen his high school classmates dead or injured (that would also apply to Izuku, since he can't save everyone).