what you are thinking is probably what is happening brother, ands its been going on for years. The only solution is to keep hopping around servers and game modes. What I do, and I hate to say this because i'm a jinx it now. But conquest is usually stacked. So what I do is I join that one first, and play a match, and if its ridiculous, then after it endss I'll go and switch to All Out Warfare, and msot likely it won't be stacked. Because whether they shuffle the teams or not, and I'm glad they do after every match or it would be alot worse trust me, but people still sync drop. And that has been my solution, but now I just gave it away publicly, so i'm screwd lmao. I really only like conquest, otherwise you could just keep switching gamemodes.
But if I jion a server and literally everyone on one time is like 5-10 and everyone on the other team is 20-5. I won't even play, I will immediately try to join another server. between the shuffling teams they do, and me leaving a game mode if its stacked. I can keep at least a 50/50 w/l ratio.