BB has had time to work through denial now and I am concluding he intends to keep her on life support as long as her body will allow it. I am surprised anyone can conclude he is a loving father considering his past history.
There is no standard period of "working through denial." There have been parents who lived in denial for decades over their children's chances of recovery.
Secondly, one can be a bad parent due to addictions or other factors yet still feel and demonstrate love for his or her child. They are not mutually exclusive terms.