i5 6600k 100% CPU usage

@RRREEEEEEEEEEE your CPU is the minimum required CPU to play BF1 so it will be under load depending on your settings since BF1 is an extremely processor intensive game. What settings are you running BF1 on, Ultra, High? Have you tried lowering the graphics to see if that alleviates the issue? What OS are you using?

I had a similar issue with my Win7 i7-3770 16GB RAM, and GTX1060 (6GB), and limiting my FPS to 61 while running on Ultra at 1440 solved my CPU load issue. I know you don't want to do it but at least try it to see if it solves or helps the alleviate issue as part of the troubleshooting process.  You can always remove the limiter after the next patch to see if the issues is solved if it does solve your issue at this time.

One potential issue is your use of MSI Afterburner. This program has caused issues with every Battlefield release since BF3.  I recommend to disable it and then play BF1 to see if your issue goes away.

Also are you using the in game graphics options or the GeForce experience application to manage the in game graphics? I found that most of my BF1 related issues went away when I uninstalled GeForce experience and did a clean install of the latest driver set installing only the GPU driver and latest physix driver.

Regarding discord (and it's step brother Slack), I've found that it uses a lot of memory when I game - and the more discords you are subscribed to the worse the issue becomes.  On the rare occasion that I get a stutter turning off discord makes the stutter go away.