The fights are OBVIOUSLY poorly balanced on "balanced" mode. You almost always fight a party larger in size than yours, and you almost always do so at some tactical disadvantage.
The enemy is ALWAYS perfectly prepared with ranged AOE attacks. The enemy is ALWAYS ready to shove you in to some pit or ocean (recently got tossed in the lake in Baldur's Gate. Instant death. What a fun pleasurable experience.)
Check out the following:
https://www.dndbeyond.com/sources/basic-rules/building-combat-encountersIt talks about how enemy advantages and enemy party size affect the difficulty of the encounter and must be accounted for. They clearly skipped this step when they set the encounters up in Baldur's Gate 3.
