Unfortunately the bad ending, which is the one he got, isn't that hard to get if you aren't thinking clearly.
Even if you get it remember you can go to youtube and watch the good endings.
I've gotten both of the "good endings" now, though after seeing them I'd say there's only one truly good ending.
The Empress ending is heartbreaking. Ciri leaving, not knowing if she's ever going to see Geralt and Yennefer again and Geralt's look when he realizes what's going on. :'(
The Ciri becomes a sort-of Witcher ending is the only one that left me with a smile on my face.
The Ciri becomes a sort-of Witcher ending is the only one that left me with a smile on my face.