The problem is fixed, at least it seems so for me.
Treyarch bullshitted it as "Some people are having problems with connecting online" as opposed to "our servers

ed up", since it seemed pretty universal on the forums.
Also, I found a new camper type I hate, people who lie prone in doorways on my team. Camping in general sucks, but some asshole sitting in a corner doesn't affect me, some guy sitting in a doorway so I can't pass really pisses me off.
And I really wish the game wouldn't spawn people near you if you use ghost, since it ruins the whole goddamn point of the perk. And I've been killed because it spawns somebody behind me, so I hear him and spin around, and some guy comes up where I would have been looking and shoots me. They could also make Ninja Pro make allies footsteps silent. I'd use it again if they did.
And people need to stop walking in front of me when I'm aiming down the sights somewhere and about to shoot an enemy, and instead what happens is the enemy gets a double kill.
Honestly, sometimes I think bots would be better teammates.
And it's official, I'm done reviving people in Second Chance. I don't care if the other team gets a kill, I will not support "Enhanced Death".