I feel this. I'm still in the first act and taking my time, but I've already lost Gale because I accidentally selected the option to not give him a magical item to consume after he asked a second time - I said I would, and then when I went into the selection menu I realized I couldn't give him the item I intended, so I backed out and he said fuck you and left. So that's great for me. Maybe he'll come back later but then again maybe not. So that's a whole character I don't have any more because of an accident.

Oh, and I also never got Lazel because I never went to the area where she was captured until much later and she wasn't there any more. I did find her (before that, funnily enough) as part of the cut scene with the Githyanki near the bridge but I didn't know she was a playable character, plus she acted like an enemy and I was really low level and got destroyed so I had to reload. So that's another character I don't have and may never get, although I'll have to go back now that I'm a higher level and see what happens.

My point is that it's really easy to miss out on large parts of the game due to random or accidental decisions, so I do understand people who find the experience off-putting. Still, I've been lucky to have enough free time to be able to play through with my wife so I've been able to avoid a lot of the stuff I fucked up in my solo game, and I personally love the game despite the experiences I outlined above.