Angry implies we're somehow out of line for believing that they are charging too high a price for a product, especially ones that we provide much of the value to.

Think of those "by the pound" frozen yogurt and toppings places. One day they charge a fair price and sometime later they up their prices and start charging different amounts for different stuff, etc.

I'm not angry if I dip on over to the grocery store and get my own stuff instead. Disappointed that we lost something cool, maybe, but that's on THEIR dumb choices.