COD has had people jumping and shooting since COD4.I get where you’re coming from. Its not like it was years ago. Everyone is using the latest META also everyone uses a pro controller and headphones. It’s a sweatfest out there.
Dropshotting was the main thing to do in COD4 because the time to prone was so quick but you'd get people doing all sorts - and the same with MW2. Black Ops 1 lowered the prone time so it transitioned to more players jumping whilst shooting and less drop shotting.
Black Ops 1 came out 14 years ago, this isn't something recent with headsets and controllers that's suddenly causing people to jump and shoot.