If you want to stay in your little bubble and be in denial, I won't stop you. But I have not seen you give any adequate counter-arguments to the facts I've posted, so I must assume that I am right.
Welp all i have to really say is your system is flawed as you have stated it. Its unstable and would only be good in the short term, as Monarchies go stale. A US style Democracy while having its own problems, gives its people enough say to make change while establishing a government that can decide for its people as well.
It allows for multiple ideologies, and gives people a right to decide. A monarchy, while like a constitutional one, (Which borrows ideas from Republics to let you know), gives people rights and such, but the amount of power and privilege given to special families that really no more deserve power than the next bloke have all the say.
Also I am going based off what you said
. With a single person given that much responsibility you have to hope each successor is a damn saint to keep the people happy, or become oppressive and make the people fear you, which I see as not preferable but it does garner control.
Now I have to say, that what is best depends on the times i can give you that, however I will say as time progresses, the need for a monarchy, as it already stands will grow less and less.
That is not to say Monarchies will die out, but Democracy in the end will rule, as the world reaches a point where cooperation between nations is necessary, One man will never be given the right to rule, and so it will come down to a global democracy in the end.
Imperialism is dead, as people who attempt such things now generally don't succeed, and that has always seemed to me to be a big part of Monarchies.
I just don't see a Monarchy as good. A Parliamentary one maybe but that is essentially only a few steps away from a republic.