Electricity!

Maddening because all of it is destructive of wealth and community but with absolutely nothing in return. If you see global warming and climate change as the biggest hustle in the history of the human race, repulsively stupid, where the community is defrauded and robbed to benefit a handful of grifters in a way that will make some of them very wealthy indeed [see Al Gore], or will raise incomes and status for quite a number beyond any worth provided whatsoever [the halls of academia and the business community are filled with such vultures], then the world as you see it has truly gone mad. Infuriating for the rest of us, but without the slightest idea how to change direction before we go over the cliff.