>>58504073Yeah, he just says he went about it the wrong way. He gave way too much to society and received too little in return, and from this imbalance his hatred for humanity sprung forth. He didn't want to try and understand, because if he did he might not have fired the Ultimate Weapon and everything he worked fire and believed in would've been for naught.
It's why Zygarde protected him and dug him out of the ruins. Zygarde is concerned with balance, and Lysandre was deeply unbalanced. As L, supporting Zygarde, he comes to find a more balanced outlook on life, one that supports other people and Pokemon instead of trying one extreme in his despair.
Even the Wild Zones popping up around the city, giving more and more of Lumiose to groups of aggressive wild Pokemon, plays into the balance theme of the game.