System Software:
macOS Catalina 10.15.5 (19F101)
Time since boot: About 8 days
With only 8GB of hard-to-upgrade RAM, restarting every few days can help performance.
Please either enable Full Drive Access in EtreCheck, or see this Apple support article to find out what "Other Process" is using 175% of your processor:
See how apps affect Mac performance, battery runtime, temperature, and fan activity - Apple Support
⚠️ NOTE: Steps 1 and 2 in that article are vitally important to getting usable results. Skip those and you may as well skip the entire test.
Another note---the test uses Activity Monitor ( or "AM," a part of macOS). AM's display is dynamic, changing every few seconds. You must watch the display for about 30 seconds, noting any process names that continue to "bubble" to the top of the list. The dynamic display makes screen shots hard to capture as well. Simply note the process and post its name here.