New HD tv 32 inch sensitivity problem

I used to have 18 inch Tv.
I just got a new TV and the past 5 hours I've been trying to get back into CoD.

With this new TV the sensitivity is extremely sensitive. I have tried nearly every combination of settings.

I have changed the safe area of the screen, no prevail.
I have changed the display modes via Xbox dashboard and tried both "Normal" and Widescreen.
I have tried all sensitivities 1-10 now.

It's not that the sensitivity is too fast or too slow, it's just that once I invest in locking onto a target, I can barely move the sight.

I aim and I zoom the the right of an enemy, the enemy will obviously be moving around and as I try to shoot in his direction it's nearly impossible due to the moving time after investing in the first sight.

I aim and zoom to the center of an enemy and get a hitmarker, then the character moves and because of the abnormal speed of my aim down sight I fail to hit him again.

My only option is to zig zag my shot and hope I get a kill.

The tv is a 32" LED.

Please help me, I've tried almost everything. Please if there is anything you know, help thanks.