I have basically been addicted to CoD for the past couple of years, but recently finally cracked and got annoyed enough that I don't play nearly as often, or nearly as long anymore. Expensive and overly monetized, absolutely, but there are so many other issues. This is my way-too-long rant that I always go on about CoD:
Camo that is always intentionally very dark so that people will buy it, and then it will get nerfed once sales die down
Same with OP weapon blueprints-- sell the new OP blueprint, then nerf it eventually, and then take the PR stance of claiming that you listen to fan feedback.
Feeling like I'm playing Pokémon with all the swords and shields... I hate shields. Shields making someone practically invincible on almost half of their body, and them having zero movement penalty when they are on someone's back is absolute horseshit. Swords, where people can run faster because it's a light weapon, and you can have the Double Time perk to move even faster, so that they can just rush you and slap you with an instant kill is also absolute horseshit. I DO love sticking a shield person with Thermite, but so many other things should work against them and they just don't.
The game crashing, and crashing often. Which for MWII was only fixed in the last couple of months, in my experience.
The incredibly annoying "Restart Game" prompt when you load up CoD, it downloads the stupid store bullshit, and then the game needs to be restarted before you can continue
The stupid UI. Let me get to Quick Play, IDK, quickly, maybe? I should not have to click through a million stupid tiles just to get to Quick Play
Oh, and stop fucking changing my playlist filter to include some random game mode every now and then. If I have my filter set to just TDM, don't you damn dare any other mode onto that filter.
Night maps. Fuck night maps. MWII has one night map, and there's zero options in these games to filter out night maps or any other map you may despise (like Border Crossing).
Despite all of this (and so, so much more) I still have 600+ hours into MWII alone, but the more I play it now, the more I find I just get angry at how shitty the entire experience actually is. The parts of it that are fun and addicting are not worth all the other bullshit. I do not intend to purchase MWIII.