Terrible luck aside, It seems to mostly be a question of what a "good ending" means to you personally
I was meaning "good" in the DnD alignment sense, but beyond that I'll admit I didn't ponder it very carefully, and was interested in others' takes on what that might be. But I suppose what I was really thinking of was an ending where the player character reluctantly turns into a mindflayer because they're not willing to sacrifice anyone else. I do accept that other endings can be thought of as "good", but for me that's the one I suspect most of my favourite good-aligned characters are going to end up experiencing and, while it's always going to be a tragedy, where I'd appreciate some *slight* mitigation of the grimness.
I'm sure I read a while ago that part of the point of the (good) story in BG3 is "are you prepared to sacrifice (things) to save the world?" As I said before, I had the Emperor sort it out so I haven't experienced the same choice as you, but I don't think being good aligned
necessarily means sacrificing yourself for the greater good. To me, being good-aligned means generally having good intentions, but maybe turning into a mindflayer is just too far for your character. In my case, my character reluctantly sacrificed Orpheus. Probably not the most good thing to do, but
It's what my character would do! (as all bad D&D players say ;-) )
