Re: Another massive fail.
My £170 purchase of Nest smart thermostat 3 years ago has already paid for itself. During the winter months, I saw a £12 a month saving on heating bills, AND the house felt warmer. My previous thermostat wasn't set wrong, it was just very dumb, not taking into account outside temp, weather forecasts, time to heat up the house, cool-down times, and when people are likely to be around.
Don't be an idiot that falls into the trap thinking everything IoT is crap, it's not. There are real savings to be had. You have just shown the world that you really shouldn't be working in the technology sector with your closed minded black and white attitude. May I suggest a career at McDonalds, they are always on the lookout for people like yourself.