In my playthrough Bulette didn't even burrow out until I reached the Sussur tree loaction.
I'm also not sure why people are even attempting a lv5 boss without having a source of Bless in the party to actually land skills on a mob 1 level over you.
In that party comp 3 out of 4 didn't even have Darkvision.
Your playthrough is the exception and not the rule given that the Bulette can and does regularly show up near the minotaur patrol area and can show up during the battle. As to bless or being 5th level, I'm not sure how you can type that with any seriousness considering the bulette can take flying bellyflops off of high ground and do 250 damage to multiple party members.
Bulette legit knocked me down while crossing near minotaurs, but it's pretty obvious she has specific spawn points to trigger out of. The lower ramp near minotaurs and the sussar zone are examples.
And why would Bulette have high ground on you to begin with. She did a Bellyflop on 3 of my teammates and missed 2 thanks to mirror images, bless, and armor of faith granting me 30+ AC.
I don't get the complaint.
Legit 2 shot of Bulette.
Some of you are exaggerating the difficulty of the encounter or running really suboptimal comps.
And the answer to that is to blame Larian for making so many classes and spells and companions sheer, weak traps, and making consumables and martial classes so comparatively strong.
Doesn't help the elven races are vastly superior to the rest thanks to immunity to sleep, darkvision, saving throw against charm, and +2 DEx giving more initiative and one more AC.
Meanwhile Tieflings get trash racials with fire resistance and +2 charisma which is only worth anything to a warlock. And humans even worse.
Elves+ Dwarves>>>>every other race by a long shot.
