I have still only been killed 3-4 times total by quickscopers in my almost 1 day of playtime. Maybe I'm playing at the wrong time of the day? Are quickscopers the daytime television of Call of Duty?
Play with me and you'll see them every match. I'm a quickscope magnet. It also might have something to do with 'true skill' matchmaking. Maybe you're getting people who just aren't experienced enough to attempt it.
Quickscoping doesn't bother me though. If you ever look at their stats you'll see that they're always negative as shit.