Esports standings count series (matches) and the maps or games inside them. A best-of-three that finishes 2–1 is one series win and a map record of 2–1, and map differential is the first thing that separates teams with the same series record.
Leagues differ on points. Some award a flat number per series win, some a point per map won, and some reward a clean 2–0 over a 2–1. Shooters like Counter-Strike and Valorant can also break ties on round differential, one level further down.
Larger events often use a Swiss format instead of a round robin: teams with the same record play each other each round, and a team is through at a set number of wins or out at the same number of losses. That gets a fair ranking from far fewer games than everyone playing everyone.