Why are they associating with dodgy businessmen? Selling access? Having sordid affairs? Putting themselves in positions where they can get stung by the News of the World fake sheikhs? Getting into debt and having those debts paid by rich associates? Spilling their guts on TV about how hard done by they are?
How is this making Britain look good - it's all sleazy as fuck, no matter how much pomp and ceremony is involved.
At the hub of all.of this is the age old problem of filthy lucre. The old aristocracy (with a few exceptions such as the Duke of Westminster) can no longer compete with the newly moneyed.
PA was allegedly associating with allegedly dodgy businessmen because of his ex-wife's alleged debts.
Sophie Wessex was involved in what was euphemistically called a "pr scandal" two years in to her marriage.
Others sold the rights to their weddings to Hello magazine or sold milk to the Chinese.
The extended family may have what we would consider to be generous allowances and grace & favour accommodation but it is "old money" and probably not enough to keep their dc in public schools, give them a generous annual income, ski chalets, luxury cars, couture and designer clothes and jewellery, support luxury travel and basically allow them to host and mix with and entertain the seriously rich members of society who will afford them privacy.
It's probably fine if you are Princess Anne and are happy living in a largely unrenovated stately pile in the muddy countryside with a stable of event horses and content to socialise with the Master of the Hounds in the local village and the local equally "impoverished" (its all relative 
) marchioness who lives down the road, drive a battered range rover and wear clothes dating back to the 1970s.
But PA and the younger generation of royals probably want swanky ski holidays, holidays in the Bahamas, and on Mustique, to go out to fancy restaurants and nightclubs, fly first class, drink vintage champagne and wear designer attire.
In short they can't keep up with their equivalent of the Joneses.
It's all completely vacuous in my view. Smoothed over with a very, very thin veneer of them doing "good works".
The extended family should have been raised to believe that they were going to have to put their expensive educations to better use and work for a living. But that was never on their radar. The world has changed dramatically and they have been caught short.
And all of this I'm afraid has come about through poor advice, having an older monarch from a different generation who hasn't kept up with the times, and an unchallenged sense of entitlement and privilege.