He hasn't reached end game yet. His highest character is 54.
Though he has an impressive amount of characters around 30.

He also hasn't had any responses to any of his previous posts. So this looks like attention grabbing/troll bait.
It's also possible, he's just legitimately bad. I was bad too for a while. If you don't read the tooltips you don't realize things like Astral Fire causes bonus damage and Astral Ice increases MP regen. Until you understand the timing and why it's important it's tough to understand why to do things.

When I first hit 60, I was basically alternating B4 and F4 to keep Enochian up.
Now my damage is close to optimal (I can get 5 and sometimes 6 F4's off on my opener)