>>39670384An unprepared team going in blind. Most people who play Pokemon don't actually understand the mechanics or things like defensive cores. They just use the first three to six mons they catch because they're usually enough to steamroll the single player.
What really gets me is the people who say USUM are the hardest games in the series just because of one fight, like it excuses the other 40 hours of the game being the easiest the series has ever seen.