Will y'all stop bitching about him being too strong, and the other characters being too weak? This story was NEVER about the other characters. They were filler, or temporary hurdles. It was just him, getting stronger, and sometimes watching the scenery go by. They were the scenery. Later on they contribute to his character development.
That's right, you heard it here folks. SOLO LEVELING is entirely about one character. Get used to it.