I have always been fascinated my Cyrus and in general by gen4 games, so I have played them several times and I have read his dialogues multiple times. I feel that Cyrus is quite an interesting character and especially his psychology is interesting. Hear me out: Cyrus kinda has a distorted vision of the universe and this comes from how his parents treated him and how he could only relax with machines he used to build. This is an important point because Cyrus has no idea of how emotions rule the universe, indeed he prefers machines because those work according to algorithms and that's what intelligence is for Cyrus. He strikes for perfection, which means no emotions, because in this way everyone would act solely on algorithms. but he himself is full of hate, sadness and rage and that's why he says he isn't perfect. Also, Cyrus is egoistic, he always says that the new universe is just for him and the reason is that he feels that he's the only one truly wanting to live in that new universe. Team Galactic was just a tool to get there. I like how in the anime he decides to get into his new universe dying. I hate instead how he is portrayed in pokemon generations and in the manga: he's weak and he soon surrenders and changes his points of view, but that's not what the Cyrus we met in the games would do. indeed in pokèmon platinum he wants to stay in the distortion world to find a way to destroy it.
Anyway, Cyrus' dialogues go even deeper than this. In the distortion world there's a dialogue between Cynthia and Cyrus in which she says that everyone in the world exists for a reason and that our destiny is to accomplish that destiny with whom we were born and Cyrus disagrees. It pretty much sounds like God's will against human power, a war between religion and nihilism/atheism. It's just in that dialogue tho. Game freak couldn't go deeper because, well, it's still just a game and many children play it.
I think gen4 games have a huge lore and many interesting hints but it's playing again and again, getting speculative, ecc that u can understand more things about the story.