Naming your game after a common English word (the word 'doom')? "Doctor, it hurts when I do that. Then don't do that." A metal band and a game are both entertainment, but different forms. Furthermore, the name Doomscroll isn't the same as Doom, as it consists of two English words. On top of that, fans of Doomscroll are unlikely to get confused with Doom the game. So, ID Software is in the wrong here... but they got deep pockets.