When I was younger, you'd still buy games in a physical store and one time I found a great sounding game "Fury" (an online PvP RPG). I went ahead and bought it with my pocket money and was super eager to play it. I even remember reading the booklet in the car while driving home, imagining how fun that game will be.
At home I then installed the game just to find out the the fuckers have shut down the game servers just about 2 years after the initial release of the game rendering the game absolutely unplayable.
I'm still kinda pissed about that, and I still have that box lying around somewhere.