Photoshop Elements 2018 Mac OS Monterey - Splintered Photos

Hi, since installing the Mac OS Monterey, Photoshop Elements 2018 is working extremely slow. The worst part is that no photos are opening properly and appear splintered into different segments and are almost unintelligible. This started occurring after installing Mac OS Monterey.

-Could this splintering photo issue be caused by the new Mac OS? How would I fix this?

-If I need to uninstall Photoshop Elements 2018, can I do so without needing to buy a new license?