The battle system is the worst in the series, barring maybe II which I haven't played but have heard a lot about. The random encounters and combat in general take way too smurfing long, made even more unbearable by the ridiculously high encounter rate and being grindy as hell even compared to other FFs at the time. The way the screen transitioned and how the camera would pan around the battle environment before loading all the assets in fights, the extremely long battle animations which don't pause the timers for status effects like Haste or Slow, all make the game's pace crawl every time you enter a battle.