changed most people aren’t going around looking for abuse, and abusers are v skilled in hiding abuse, and in getting victims to hide being abused.
Everything is reinterpreted when the truth is revealed and for many people thats too hard to face, regardless of how much more traumatic it was for the victim to experience. That’s why, imo, so many people, & society as a whole even, prefer to believe the abuser rather than the victim, or to reframe it as ‘not really abuse’. Because thats less disruptive to their own lives/beliefs/shared history.
By re-examining your past you are doing some of the hard work that others avoid and recognising that you didn’t see it in him isn’t necessarily your failing to judge his character correctly, it is further abuse by him - abuse of your good nature, abuse of society ‘norms’.
People who side with abusers “N would never do that” are in fact being abused by ‘N’ too, they’ve been groomed to believe the best of ‘N’ or at least, not the truth about ‘N’s’ behaviour.
It takes so much courage to stand up against abuse, direct victims need indirect victims (like you) to stand up too.
No-one wants to be abused, or to believe they have been tricked by an abuser, but it is not a moral or character failing to have been so - the moral/character failing in abuse lies squarely in the hands of the abuser.