the companion back stories are rich, and full of tragedy.
The thing is, they’re mostly exposition dumped at you. All of them already went through the worst of it and tell you about it. To me, Larian fell in the old TTRPG trap of making up those elaborate grandiose backgrounds for your characters and expecting the other players to be impressed instead of writing the story of their adventures during the actual game.
I was there when Jaheira found Khalid’s corpse. I accompanied Nalia when she came back to a ruined home and a dead father. I broke Imoen out of the wizard’s asylum.
Karlach told me how bad the hells used to be and we proceeded to make a few trips to the blacksmith together. Wyll told me of his pact and his crazy adventures, the rest just happened to us at camp. Gale told me he banged a goddess and I got to make a persuasion check at the end. Astarion told me of the torture he suffered, and the resolution was done in 2 fights after we met zero vampires before the last room (BG2’s Bodhi and her lair were so much ahead of this it’s not even funny).
Shadowheart is the only one I felt had a story that I actually experienced with her and wasn’t just politely informed of. Oh, and Minthara, but the evil play through really got the short straw in any other way.
As a direct comparison? Baldur’s Gate 1 and 2. But pretty much everything Bioware up to Dragon Age Origins.