Sorry to hear this, it does come as a shock when it all catches up with you.
It is likely the disorder was showing earlier but in a more subtle way so that you were accepting of a lot of 'abnormal" behavior without being aware of it, as it wasn't openly toxic.
You wife's declaration that it has always been bad is probably her revisionists way of distorting memories to validate her emotions of now.
Your resentment is natural, probably made worse by the 'revelation' that your entire marriage was apparently a sham (note this is her current claim though not necessarily true). Do not feel guilty about this resentment. Acknowledge it for what it is, and dont forget there is likely to be a degree of grief mixed in there. Until you can work through this it will be hard to move forward.
Your wife will be in defensive mode and the more you press her to accept responsibility the more likely she will dig deep into her big box of delusional thinking to avoid it. The net result is neither of you can move forward.
Truth... .This is one of those things you are going have to learn that it is something you can never 100% rely on. The best you will get is her current version of reality, it may be her truth, but it can often be the revisionist truth.
You have a lot lot of realigning to do, rebuilding yourself and your values is your priority, do not try to remold yourself around her in order to appease her. She needs to want you for who you are. Your role is to make it crystal clear just who you are and what you stand for.
Is this out of your control? Yes
Can you still live with and around, something out of your control? Yes, it is possible, but you need to remain independently whole yourself.
Will it be easy?... No. There will be steps forward, and steps backwards.
Whether it thrives or fails there is a lot to learn to help yourself to be a better you.
Keep posting it is very theraputic
Waverider