Steve user wins a Super Smash Bros. Ultimate online tournament with over 500 entrants, check out the footage here - EventHubs

During the winners finals, losers finals, and grand finals, Aaron (the Alex user) faced off with BestNess (the best Ness player in the world and a frequent winner of online tournaments) and EDM|KirbyKid (one of the two best King K. Rool players in the world).

While BestNess does appear to play a solid Steve himself, he ended up being no match for Aaron being that Aaron had plenty of experience in the mirror match with his victory at the Survival Games — a tournament in which all participants were required to play Steve.

From what I can tell, Aaron seems to attack more often than other Steve players.