Inheriting half a billion from his mum and exempting himself from inheritance tax. Colluding, with the rest of his family, to protect his diseased brother from prosecution for child trafficking offenses. Not paying any tax, including income, whatsoever; unless you're happy to admit he's a freeloader who fulfills no occupation or civic duty, thus absolving himself of a financial obligation the rest of society is beholden to?
Although, actually, you might be on to something. There's a little thing called sovereign immunity, a little clause that states our head of state cannot be prosecuted or tried for any crime. They are quite literally above the law. So if the brainwashed want to nitpick at terminology, he can't be called criminal. Meanwhile, in the real world, he's a contemptible piece of shit living off the riches of bloody plunders and land grabs centuries ago.
That, in my eyes, makes him worse than a common criminal.