Worst-case scenario, you end up wiping and have to reload a save.
Then you know what not to do next time, or start thinking of creative solutions.
I dunno, the first time I came across the mindflayer, I stopped and thought "Well these things are clearly evil as fuck. It's crippled and at 3 health."
"Judging by the dialogue from the NPCs, their minds are clearly being manipulated and that thing is still very dangerous."
"What if I just shoot an arrow before getting into combat and..." Problem solved.
But just to resolve the post, you weren't stuck, you just didn't want to reload.
Being too proud to own up to the bad decision that you made in a game isn't a bug or a balancing issue, it's a judgment issue.