So common with this illness is lack of insight, not pride. While this forum is great help, please find a therapist or group for you to connect with and work out the adjustments you have to make.
Sometimes we really feel like a “good talking to” will get our loved ones going in the right direction. It won’t and you will make yourself miserable if you try.
With some insight and a great deal of work, they may begin to manage how they respond to stimuli but it will be different from now on. Some days are good, some not so good.
Please do not think they are ignoring problems. As much as things have changed for us, it has changed more so for them and they are trying to make sense of their world. Sure there are still boundaries you can set-you will not tolerate violence, substance abuse or dangerous living conditions-- but a lot of other expectations will have to be let go.
I explained my son to another family member this way: We smell brownies baking and think soon I will be enjoying a nice treat. He smells brownies, identifies the chocolate smell, remembers he read chocolate long ago was the food of gods so therefore he must be a god. We just smile and ask if he would like a brownie and let the rest of his conclusion go.
While I am sorry you have to deal with this hope you find some peace in your journey.