I blame the casual gamer. Call of Duty went from a game requiring skill and precision aiming, teamwork and sportsmanship; to a game full of immature high school potheads with nothing better to do than play 'Nazi Zombies' and Black Ops II. The games have gone from attention to detail, skill, and memory of the map; to kill streaks, perks, and half-cheats made for the casual gamer so that they play long enough to make a dollar for the company. Between installments, such as Black Ops 1 and 2, there was little to no improvement of the graphics engine, physics, or game play. They simply made the next big thing that would sell on store shelves come Christmas time and Boxing day.
The same thing happened to the Elder Scrolls franchise, the casual gamer ruined it for the older fans of the game. Morrowind, was the last installment to use dice-roll mechanics which were classic to nearly ALL role playing games at the time. The game has a great level of detail and immersion; to the point where you almost believed you were the Nerevarine incarnate destined to rid the land of all the filthy N'wah.
Now, this guy does a much better job explaining the dumbing down of the Elder Scrolls franchise, and why the Casual Gamer is at the root of the majority of problems the Gaming Industry faces today. (OMFGSH NEW GFX ITS AMAYZING DURRHURR)
https://www.youtube.com/watch?v=JweTAhyR4o0