And worse yet, we have seen this before (albeit on a lesser scale). GMO was supposed to solve global hunger, Carbon capture was supposed to solve climate change, etc. etc. These were obvious lies and propaganda back then as much as the lies where AI are supposed to help humanity today. It gets tiring, and at some point we simply crash out.
AI is currently the grift of choice.
Also I fundamentally disagree that there is any tendency for humanity to ruin it self. There are perverse intensives, which rewards undesirable behavior, there are unfair, undemocratic, or otherwise hostile powerstructures which allows one class of peoples to exploit another class of peoples. And some technology sometimes plays a pivotal role in maintaining or furthering these hostile power structures/perverse intensives.