Is it possible to go back to Premiere Pro 2020?

I stupidly recently hit update to go from Premiere Pro 2020 to 2021.

I could edit and render 4K videos on PP 2020 just fine. Occasionally the computer would freeze up and I’d have to reboot, maybe once every two projects.

Since upgrading to Premiere Pro 2021 it’s been an absolute nightmare. The program has an error every 15 minutes that causes me to have to reboot. This is AFTER I contacted support and they did Remote Desktop to update some drivers and change some features.

What it really seems to be struggling with are MOGRTS. If I add a MOGRT I basically have to render in to out immediately after adding it. I never had such issues in the previous version.

Is it possible to go back to 2020? If so, how? Thanks in advance for any responses, it could save me so much time and pain!