I have now resorted to using the Edge web app for Evernote, performance is great but I am not sure what limitations I will face over the week ahead. I use Evernote every day most of the day so it is vital. However the main Evernote app is always to of the CPU and Memory activity monitor stats and slows down the Mac too much.
I am using an M1 MacBook Pro macOS 12.0.1 Evernote 10.22.3