There should be a button you can click on to attach log files.
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Your ThrottleStop screenshot only shows 4 cores. Intel says the 9600K should have 6 cores so a couple of your cores are probably disabled and are not being used.
Intel® Core™ i5-9600K Processor (9M Cache, up to 4.60 GHz) quick reference with specifications, features, and technologies.
ark.intel.com
Did you previously have a different CPU in this computer and then upgrade it to a 9600K? If you did this then you need to run msconfig.
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Click on the Boot tab, press the Advanced options... button and make sure the Number of processors: box is
not checked. Press OK and reboot your computer. Open the Task Manager after you do this. The Task Manager Performance tab should report 6 Cores and 6 Logical processors. The ThrottleStop monitoring table should show 6 lines of data, not 4.
When your computer is idle at the desktop with only ThrottleStop open, what does ThrottleStop report for C0% on the main screen? This should be less than 1%. If you have a lot of junk running in the background on your computer, games are not going to run smoothly. Open the Task Manager, go to the Details tab and find out if there is anything running on your computer that does not need to be running. Having 6 available cores instead of 4 should help out quite a bit. Getting rid of background sludge will help out some more. Attach a new log file after you fix this.