2019 iMac 21.5 extremely slow
I have a iMac 21.5 2019 (i3, 8G RAM) which runs extremely slow from time to time, truth be told the performance seems to be much worse than the iMac 2009 and 2011 that I still use from time to time. Seems like I'm not alone and I read similar posts in the forum, many of the answers point to unnecessary anti-virus softwares, which I don't have.
I chatted with Apple Support earlier and we reviewed the activity monitor and the support staff seems to think there's no obvious issue with RAM or CPU being stressed, but I still get the forever turning beachball. It's just really painful.
I have also attached a report from running EtreCheck based on the recommendation in a few other threads.
I'd really appreciate any suggestions to improve performance of this Mac.
iMac Line (2012 and Later)