I really, really loved the series... up until Call of Duty 4. Some people may have started playing it online and called it "deep" and "addicting", while I started playing online, and encountered campers, noob-tubers, knifers, quick-scopers, and controller modders, then I turned the game off and played something that didn't piss me off whatsoever. I'm still gonna keep buying Call of Duty games though, just out of loyalty for the series, since it's the series hat got me into WWII games and military history.
In conclusion: I'm basically at a point where I'm trying to love it and give it a hug, but it keeps slapping me and telling me to go do something else.