Thank you! That shows at least two issues:
—Sometimes apps may report "low memory" when they really mean "low disk space," which appears to be your major issue:
Drives:
disk0 - APPLE SSD AP1024M 1.00 TB (Solid State - TRIM: Yes)
Internal PCI-Express 8.0 GT/s x4 NVM Express
disk0s1 - EFI [EFI] 315 MB
disk0s2 [APFS Container] 1.00 TB
disk1 [APFS Virtual drive] 1.00 TB (Shared by 6 volumes)
⚠️disk1s1 - Macintosh HD - Data (APFS) [APFS Virtual drive] (907.37 GB used) ⚠️
You have less than 10 percent free space. Offloading about 100GB of stuff should help performance.
—Remove Piriform CCleaner. Since 2000, the macOS has been self-cleaning and self-maintaining. It needs NO outside help. Many Mac performance issues are traced to useless third-party "cleaning" apps interfering with the elegant automation you paid Apple to include in the OS.
The other issue is that early version of CCleaner, which were ported from Windows, could not distinguish important Mac system files from junk, and deleted them. Ouch.