This is not my PC, it’s my work PC (which is worse). If it were up to me, I would do everything with FOSS, but it is mandatory to use Adobe, which has been getting worse day after day.
The computer is not the best, but it runs Inkscape and Krita smoothly. Adobe is fucking bloatware.
It’s not OP’s fault the company gives them a good ol’ spinning disk to work with.
Could it be the scratch disk that’s working on overdrive?
I also have to deal with spinning rust at work and working with large programs (Visual Studio in my case), but I don’t blame the modern large software for not running well on 1990s hardware.