I don't think tha anyone here has in interest in destroying his image and credibility. I think he is doing this just fine by himself
. I think, at least from what I have read between the lines, that his advisors would rather see someone else at his side, someone more respectable. In order to advise someone, you would have to have someone to listen to you and I suspect that PA does not consider this a matter where he would need anyones advise. (just as Rainier turned a deaf ear to some of his adviors - or made them too scared to speak their mind)
As to all these interviews coming out, I think that is all done on their own account. They probably think that considering his age PA will not be looking around much longer and since CW is still in the age group to bear children, she might have a good chance to grab him. They seem to forget that he has been dating the same sort of women before and hasn't settled with any of them. We don't know whether it was always Rainier meddling in it and refusing the GF or whether PA just took what he wanted and moved on when he got bored. PA can still father children when he is 80, so in that respect he wouldn't need to worry about finding a bride. He can take all the time he wants and needs. People (including the Wittstocks) seem to forget that. Also PA meets a lot of people every day. Who knows, maybe he will have "the one" standing right in front of him, when neither of them expects it and he will drop everyone else like hot potatoes. Stranger things have happened. And in the mean time he just takes what others are willing to give him (hey he is just a man and I don't know any man who would refuse a woman who gives herself that easily - unless they are deeply in love with someone else). So IMO it is not over until he has marched down the aisle, and it looks to me as though the Wittstocks are doing everything to stop him from doing it with their daughter (if she had a chance in the first place).