Your fundamental flaw in that, is that you think of morality, of "good" and "evil" as objective universal properties. However if you tried that and would apply the more sophisticated version of the golden rule, i.e. the Kantian Categorical imperative: "Act only according to that maxim whereby you can at the same time will that it should become a universal law."
Then a police state simply isn't good. If you thought about it from the perspective of the innocent imprisoned and the people being punished more or less for the conditions in which they reside and which are outside of their control, then this isn't a just system. It isn't compassionate and it couldn't get much worse either. If moral laws are those that you would WANT to be universal (so everyone, everywhere at all moments) would WANT these laws to exist, then you're not really striking for a system that employs oppression or if you do, then you're either dishonest or delusional when you state that your goal is "moral" or "good" in anything like the sense mentioned above.
So if you genuinely support that, you need a different conception of what "good" is. The usual suspects of equality, harm reduction, freedom, compassion, mutual aid and growth, cooperation, love, justice, etc... won't do, because you'd violate all of them.
Like idk how Nietzsche went away from the division of "good and evil" and argued that a master morality would need to move towards "good and bad". Where good is what is conductive to the ability of a master to be a master and bad is what is hindering it.
Which you can read as affirming life and freedom of the individual against external moral constraints. But which you could (and yeah the Nazis did...) read as being an asshole...
However what the Nazis either didn't quite get or blissfully ignored is that this is an individualistic morality, as what is "good" and "bad" relates to 1(!) subject. There is no "master race", no "chosen people" or whatnot. There is only ever one master who is the agent and the rest are tools of that agency or threats of taking it away.
So there is an inherent contradiction in the ranks of a police state. On the one hand the absolute monarch/tyrant or whatever you want to call it. Pulls the strings and everyone else is either following their plan or ending up on the list of criminals.
On the other hand he actually relies on people obeying his commands, so actually he's rather powerless without the consent of the people who enforce his rule and ultimately also without the people subject to this rule.
So the goal of the leader is to dethrone the base and to dominate his followers more thoroughly, being less reliant on their good will. While his base also tries to individually empower and enrich themselves, which would be at the expense of the master (as a self-reliant base can do without accepting domination).
So his base needs to cooperatively work together and display an amount of strength, capable of subjugating anyone, at the same time that very strength and unity is an inherent threat to the very system that wields it.
So despite pretending "stability" to the inside and outside, those systems are usually quite volatile examples of cut throat politics, with tons of intrigues and power struggles between the upper and the lower party, where the "stability" of the ruler does not entail stability of government, as the ruler is often barely more than being a figurehead. So either the current ruling faction keeps the leader in power as symbol or the other way around the ruler rules by letting factions compete for his support.
Also as you quote 1984, Orwell was rather blunt how and why that works:
'You are ruling over us for our own good,' he (Winston, outer party/resistance) said feebly. 'You believe that human beings are not fit to govern themselves, and therefore --'
He started and almost cried out. A pang of pain had shot through his body. O'Brien had pushed the lever of the dial up to thirty-five.
'That was stupid, Winston, stupid!' he (O'Brien, inner party) said. 'You should know better than to say a thing like that.'
[...] we are interested solely in power. Not wealth or luxury or long life or happiness: only power, pure power. What pure power means you will understand presently. We are different from all the oligarchies of the past, in that we know what we are doing. All the others, even those who resembled ourselves, were cowards and hypocrites. The German Nazis and the Russian Communists came very close to us in their methods, but they never had the courage to recognize their own motives. They pretended, perhaps they even believed, that they had seized power unwillingly and for a limited time, and that just round the corner there lay a paradise where human beings would be free and equal. We are not like that. We know that no one ever seizes power with the intention of relinquishing it. Power is not a means, it is an end. One does not establish a dictatorship in order to safeguard a revolution; one makes the revolution in order to establish the dictatorship. The object of persecution is persecution. The object of torture is torture. The object of power is power.
'How does one man assert his power over another, Winston?'
Winston thought. 'By making him suffer,' he said.
'Exactly. By making him suffer. Obedience is not enough. Unless he is suffering, how can you be sure that he is obeying your will and not his own? Power is in inflicting pain and humiliation. Power is in tearing human minds to pieces and putting them together again in new shapes of your own choosing. Do you begin to see, then, what kind of world we are creating? It is the exact opposite of the stupid hedonistic Utopias that the old reformers imagined. A world of fear and treachery is torment, a world of trampling and being trampled upon, a world which will grow not less but more merciless as it refines itself. Progress in our world will be progress towards more pain. The old civilizations claimed that they were founded on love or justice. Ours is founded upon hatred. In our world there will be no emotions except fear, rage, triumph, and self-abasement.
I mean Orwell told his subjects as much in order to break them down so much that they willingly contribute after having seen that they have no chance at all. While real world counterparts usually make their base believe almost the opposite of their policies seek to actually accomplish.
Like how "national socialism" is a complete oxymoron or how "MAGA" is meaningless without specifying what "Great" or "Again" refers to. But it allows the base to imagine something that the head isn't actually moving towards and keeps them complicit until they are co-conspirators in the crime and can't go back and until they are disempowered and subjugated to the point where their support no longer matters.
So TL;DR you'd need to specify where in that food chain your character is located as there is no coherent universal ideology of fascism and no end game to it. A police state usually doesn't serve a purpose, it serves itself.