There is alot of deaths behind cover is the only thing I notice. But I don't see it as a huge problem honestly. now if I felt like I was literally getting killed through the walls, or shooting people and nothing happening, then I woulds be upset lol. But the deaths seem normal to me bud, i haven't noticed any of the issue you are describing. I have fios in the north east. I mean you are talking to an old man who use to play quake online with 150 ping when you had to aim literally seconds ahead of people. if I think peole is straight up killing me through walls I assume its a cheat bot. I see people on social media complaining about netcode, Like grandpa gaming shooing a sniper at someone standing still 3 times, two of the bullets miss and he blames it on netcode. But i'm not buying it. For me that would only make sense if the guy was moving. What they did was nerf alot of guns at long range. Maybe there are also some variables out of our control. I don' t know. But I'm not seeing anything game breaking.
Lets put it this way people use to tell us we can't see over 60hz with human eye. that is now an obvious lie. Now they say an 8000hz mouse won't make any difference on a monitor under 240hz. that is another lie brother. 8000hz kb making no difference? another lie. And even things you can't notice with the human eye, are still there because of the timing in your mind, the muscle memory, etc, you will have the quicker reaction regardless. What you are seeing on screen is not always the cause of the outcome. So don't think you are losing gun battles because of this is what I'm saying.