Is this an internal or external SSD?
What is the make & model of the SSD? FYI, not all SSDs are compatible with all computers plus many current SSDs are just low end budget economy models that can be as slow as a hard drive at times especially after writing lots of data to the SSD in a short period of time like an OS install/clone, software installs & updates, etc.
To look for possible software issues run EtreCheck and post the report here using the "Additional Text" icon which looks like a piece of paper. If you give EtreCheck "Full Disk Access", then the report will include more information including a summary of the recent logs which may provide more clues.
To check the health of the SSD and any other internal drives run DriveDx and post the report for each drive here using the "Additional Text" icon which looks like a piece of paper.
You can also try running the Apple Diagnostics to see if any hardware issues are detected. The diagnostics will sometimes report a false failure if a third party drive is installed internally.
Also disconnect all external devices to see if one of them is causing a problem.
What OS were you using before and what OS are you using now? Is CS:GO even compatible with the OS you are using?