Wow! When I worked in law enforcement, we called this a "clue":
Top Processes Snapshot by CPU:
Process (count) CPU (Source - Location)
kav 25.76 % (Kaspersky Lab UK Limited) ⚠️
MailStorageManagement 25.58 % (Apple)
EtreCheckPro 20.62 % (Etresoft, Inc.)
deleted 16.50 % (Apple)
mdsync 15.84 % (Apple)
Kaspersky, a package banned from use in government offices by several countries due to security concerns, has a single component gobbling up ONE-QUARTER of your CPU cycles at the time of testing!!!
Your Fusion drive is underperforming on the Write speed side:
Performance:
System Load: 1.93 (1 min ago) 2.22 (5 min ago) 2.91 (15 min ago)
Nominal I/O speed: 46.49 MB/s
File system: 27.47 seconds
Write speed: 300 MB/s ⚠️
Read speed: 2749 MB/s
I collect Etrecheck drive reports and the slowest healthy Fusion drive in that data set is writing at 500 MB/sec. Removing the unneeded software may improve that. Run Etrecheck agina after evicting all the fearware to see if the write speed increases