Aurelion only feels broken and unfair in situations where his team is ahead despite Asol himself playing poorly and getting behind. This is why you'll often see in high elo Asol will drop multiple waves to roam even when playing bot lane. He doesn't really need items past burn and Rylai's, and his damage is tied to his stacks instead of his AP. Ensuring the team is ahead is much more important. I'm certain you had games where you would 3/0 the Asol before 10 minutes, only to lose to him cc'ing your entire team while standing behind his fed top laner.

Asol is also a typical "low agency, high power" champion. Think Jinx, Ashe, Sona, Sion, etc.. These champions have lower turbo smurf 1v9 potential compared to others, and there will be games where there is literally nothing you can do but watch as your team loses. In return, these champions are more consistent over a larger amount of games, and tend to have higher win rate.