SSD disk failure, but scans show it's healthy and Windows Task Manager shows weird graph

Replacing your SSD is undoubtedly the savvy advice.

Anyway, you could use some S.M.A.R.T. tools to perform further testing. If you have none installed on your system, you can try smartmontools - I have only used it on Linux, but it's available for many Windows versions too, including Windows 10.

The read of some S.M.A.R.T. attributes would be a good indicator of a failing disks. Usually a critical condition is associated with non-zero raw values for at least one of these attributes:

• ID: 5 - Reallocated Sectors Count
• ID: 187 - Reported Uncorrectable Errors
• ID: 188 - Command Timeout
• ID: 197 - Current Pending Sector Count
• ID: 198 - Uncorrectable Sector Count

Note that any given device supports only a set of the available attributes, so you may not find all of them reported for your SSD.

See, for reference, S.M.A.R.T on Wikipedia

Finally, please note that it's always a matter of probability: no test can predict a disk failure with 100% accuracy.

You have 30 errors of type Reported Uncorrectable Errors:

Reported Uncorrectable Errors : S.M.A.R.T. parameter indicates a number of errors that could not be recovered using hardware ECC (error-correcting code).

Meaning that 30 times a read of one or more sectors from the disk was unsuccessful. The fact that it could not be recovered using the ECC, means a hard error of more than one or two bad bits found in at least one word of one or more disk sectors. This unrecoverable error means that contents have been lost for forever.

SSDs are not always reliable : Some last as long as a HDD, but some quickly fail. When choosing a new SSD, usually the ones marked "Enterprise" are stronger and have a longer warranty period.

You should backup your data as soon as possible.

Since this is presumably your system drive, you might also take a disk image using a third-party product such as EaseUS Todo Backup Free or AOMEI Partition Assistant Professional trial, and try to migrate to a new disk. You might be lucky in that the lost bytes were non-essential, so you could avoid re-installing Windows from scratch.

After migration, if you are still worried about the integrity of Windows setup, run chkdsk and sfc /scannow, and if problems are found and even if they are announced fixed, I would counsel to Repair Install Windows 10 with an In-place Upgrade, which might be useful in any case to assure the health of your Windows installation.