I think all this case has done is to undermine his credibility further.
That he lied about his offer to pay for security. That he already knew the palace had pursued this avenue, despite his narrative that his family is a shower of shits who cut him off at the knees.
That he'd been advised very clearly that his security arrangements would be reviewed and likely downgraded.
That's he's prepared to throw his weight around and make threats "I want the name of the person" etc etc
I think it's obvious the person(s) in comparison are W/W&C.
He can't compare to his father and all his cousins do not have full time security.
So the only person he can use is W and his family.
The problem with that is aside from the fact W is heir to the throne, he's also based in the UK.
The best comparators are his father's siblings when their mother was alive. None of these had full time security.
H is fundamentally arguing he is more "special" than any other member of his family in comparable circumstances. He's not.
He also might want to reflect on the argument re: threats from the Taliban after Spare being released was entirely predictable and if his own making as was his decision to move to the US.
The levels of security in place for him now are approximate.
He just wants everyone to believe the world is against him and M when frankly most people increasingly consider their positions as self inflicted, self serving and self absorbed.