First of all, you say that you are getting 130-165 fps in cold war, wich is perfectly fine. Does the game run correctly, because for me it could be a PSU issue.
The resolution also affects your performance, a 2600 with a 2070 super would be more effective at 1440p as the game become more CPU bound. It could be that your CPU isn't strong enough for your graphics card, but the fact that your CPU is at 50-55 is leaving me sceptical.
The least I could say, if you think your CPU is the bottleneck, maybe you'll have to upgrade.