If they say god appointed the person, is monarchy. If the person say she is going to stay in power because enemies, then it's a dictatorship.
Monarchy just means "rule by one". Dictatorship means, "because I said so".
A king who gets their power from God and can make rules whether or not the people consent is both a monarch and a dictator.
If they have power, yes.
ALL dictatorships need public support to remain in power. Even medeival kings needed public support from the merchant class.
Well, what they need is obedience, and to obtain it they often reach for the path of spreading fear, doubt, uncertainty, violence, menace, murder, torture, and so on. Sure that's not the less brittle way to grab and retain political power in your claws, as it certainly also foster an environment full of people eager to stab you too death at first possible occasion. But there is not much morale and brillant about greed.
When setting repressive measure to mute any opposition and skyrocketing the budget of their personal security agaisnt all raising threats?
Remember, dictators are never wrong. They can only ever double down.
It's why they are so destructive.
Brian Klaas wrote an interesting article about that, saying that the biggest weakness of dictators/autocrats is that they surround themselves with 'yes men' and quickly lose touch with reality.
Sounds like the tyranny of rocket equation applied to personal security. At some point, the cost to derisk exceeds what is available or logistically feasible.