He's treating society and the planet like some speedrun of a Civilization game where the player gets lazy, allows everything to deteriorate, and just pounds the "end turn" button while dumping everything into the Le Science Victory win condition.

Except such a thing doesn't fucking exist but he's doing it anyway.

NGL, I have to hand it to Pokémon for inadvertently predicting Elon Musk.

Look up Both Lysandre and team flare

found Lysandre Labs and create the Holo-Caster. He seeks to create a beautiful world by destroying every Pokémon and human not part of Team Flare.

"I want to be the kind of person who gives... But in this world, some foolish humans exist who would show their strength by taking what isn't theirs." "They're filth!" - actual Lysandre quote that sounds like something muskrat would tweet

The Chosen One: His understanding of Mega Evolution has led him to conclude that there's only a very few people and Pokémon capable of having genuinely beautiful souls. Team Flare is his idea of how to collect as many "chosen" as he possibly can together before erasing every last not-chosen being from the world.

Evil Malthusian: He's become a misanthrope convinced that he must wipe out the "unproductive fools" that are "consuming our future" to preserve the world's resources, and so wants to use an ancient superweapon to kill every human and Pokémon not within Team Flare.

Omnicidal Maniac: He seeks the utter destruction of all humans and Pokémon not loyal to him. At least Cyrus intended to recreate the world and every person/Pokémon in it, albeit in his own image. This man is set on clearing living space for his group via genocide

Politically Incorrect Villain: There's just no way around it; the man is an incredible elitist. Only beautiful things (beautiful things that will never change, at that) are valuable. He regards most people as selfish filth. Then there's the really (or at least comparatively) subtle bit: You can't join Team Flare, and thus be spared from the cleansing of the world, unless you pay 5 million right up front. Considering the rough equivalence of the game currency to yen, and yen being roughly equivalent to American cents, you have to be willing and able to "donate" about $50,000 to be let in. There is no way anybody born into the lower economic echelons is getting in. Just to punctuate it, being fine with the "wane" part of natural existence is detestable. He's clearly uncomfortable with Diantha's lack of worry over her glamour eventually fading, when it's the duty of the beautiful to stay beautiful for all eternity. Compromise with the not-highest is not acceptable.