As I have said previously, I don't have this species of parrot so there are some things that I can't really say much about since I don't have the experience with them. Most of the time I can answer due to the similarities in the behaviors of this species and the behaviors of other species.
As far as I am aware of no one has yet been able to say why any parrot chooses this or that person to bond with over another person. birds have been known to bond to people who totally adore them as well as with people who will not have anything to do with them. We just do not know what person they will choose or why. We know that who cares for their needs such as cleaning their cage or feeding them has no bearing on who they will choose.
I know that you love birds and as far as I am concerned you have more than proven this over and again. With the problems that you all are having, is it possible that this species of parrot and you just do not fit? Is it possible that what you are looking for is an aviary type bird as opposed to a companion species?
I look back to the beginning of this and noted that your primary experience is with budgies which are really better as an aviary type of bird than as a companion species. One of the differences is that the aviary species tend to bond more with each other and are a more hands off type of bird. Their is some bonding but as far as I am aware it is not to the same degree as with the companion species which bond very closely to their chosen human. I think that it is worth considering.
All I can say at this point is that this is all new ground for me as I have not experienced this level of problems with a bird and my inexperience is showing through.





