Photoshop 21.2: When I magnify the photo for editing and I use the hand to move the photo it moves very slowly and very chunky

Perhaps your computer or your GPU or RAM needs to be updated?

What is the computer? What OS, and which version? How old?

How much memory is installed and how much hard drive space?

If you do want to uninstall this (or any installed versions of PS CC that you own)...
that can be done via Creative Cloud.

Mark D. McNabb
Here's what I wrote to someone else who was asserting that Adobe "should have forewarned him" that his computer was not up to the task: ": Considering the  near infinite number of possible combinations of hardware and other software on that hardware across the planet, a disclosure document to prevent someone from making a self inflicted problem with upgrade would of necessity be a near infinite sized document!   It is not reasonable for any software maker nor any other producer of anything to be expected to anticipate their end-user's particular circumstances and to prevent those end users from having this sort of experience.

Anyone who has been around electronics very long can reasonably be expected to be aware that hardware must keep pace with software without a nanny  call to make sure."

It may help if we could see your Photoshop System Info. Launch Photoshop, and select Help >System Info...and copy/paste the text in a reply. A screen recording of what you're seeing would be helpful, too.