How self-critical is Fitzgerald in Tender is the Night?

I'm re-reading Tender is the Night right now (read it in college about twenty years ago). I've read a bit of the commentary on it, and the book seems to be largely autobiographical (Fitzgerald's affair with a 17-year-old actress, Zelda grabbing the wheel while he was driving and trying to kill him, herself, and their children). It's basically a fictionalized account of Fitzgerald complaining that Zelda's mental issues ruined his potential.

Fitzgerald does come across as self-critical in the sense that he feels he squandered his potential, but I can't tell how self-critical he is of his treatment of Zelda. In the book, Dick marries a girl (and, yeah, I'm self-consciously using that term instead of "woman") who has emotional problems because she was raped by her father as a teenager. Dick keeps cheating on her with teenage girls, and whenever he gets caught he uses Nicole's tenuous sense of reality to gaslight her about it, until the point where her inability to differentiate fact from fantasy causes a serious mental break, which Dick then holds against her. Dick comes across as selfish, entitled, and prideful, contemptuously condemning Nicole as "crazy" for experiencing what appear to be totally normal reactions to his infidelities (especially given her history of being taken advantage of as a teenager by a trusted older man).

I think (hope?) most modern-day readers would be disgusted by Dick's behavior, but there's no indication in the book itself that Fitzgerald feels that way. And, from what I understand about his treatment of Zelda, it seems like he didn't feel that way in real life, either.

So, what do you think? Is Fitzgerald using Dick to lament his treatment of Zelda, or to justify it?