First off, lag. It happens so much and I don't mean the dude who teleports (which still happens). I'm talking about hit registration. I melee someone, a second later, after they're dead, I die. I get my shots off first, he turns, I die THEN his health drops. Seriously. Why is it so hard? Why? Second, SBMM. Oh for the love of god, SBMM. I play solo and the matches are either even or stupid sweaty. I join on a buddy of mine who's not the best and it's a cake walk. I though the who purpose of Quickplay was to find people with the same connection as ours, be it good or bad, load in and play. Now I don't about being "pub stomped" or whatever, because playing against a better team helps me improve. I do care about the shitty connections. I love the franchise but come on.
If you see lag that often then I recommend troubleshooting on your end.