That’s so difficult for you. The way I’m reading this though is that he’s in assisted living now and hopefully there will be an eye kept on him there.
If you’ve been assigned the scapegoat role in the dynamics of this dysfunctional family there isn’t a lot you can do,
Kudos to you that you cared enough to report his neglect, that was imo the right thing to do, although it wasn’t well received by your dad it was in his best interest. It’s such a shame your family aren’t capable of treating you with the same care and concern.