Thing is when your system is dying and nothing is responding, you can almost always trust task manager to respond because of its privileges, simplicity and the fact it’s built into the OS rather than using APIs, even if explorer.exe crashes.
Given there’s no “ctrl-alt-f2: Imma go fix this mess” on Windows, having at least something you can rely on to not die is super valuable even if it is bad.
I’m not saying this tool isn’t better for system monitoring (but I would like to see something like KSysGuard), just that Microsoft absolutely shouldn’t touch task manager to fix whatever’s wrong with it’s resource usage monitoring functionality to avoid breaking something else in it