@martin0297
As you can see, your CPU doesn't meet the system requirements for the game. Unsurprisingly, that you experience high CPU usage.
I had i5 2500k and 780Ti and I also had 100% CPU usage, when I changed the CPU to i7 7700k with the same GPU I get about 70-80% usage. I don't know why other people with new CPU's get high usage, but I don't have similar issue.
My recommendation is change the CPU or try to decrease your CPU usage by locking your FPS on 60FPS. Go to Video Settings of the game>>Advanced and set "Farmerate Limiter" to 60 FPS and enable V-Sync. Also, running a clean boot on your PC also can help you: https://help.ea.com/tr/help/faq/how-to-clean-boot-your-pc/
About your thermal paste, when did you last replace it? 70-80C is normal for CPU of course if you use air cooling.