I also have this problem. Evernote is wonderful but scrolling through notes with images is dog-slow on my 4K monitor powered by an upgraded 2018 Mac mini. I can scroll through pretty much any other app without issue, but Evernotes - especially with multimedia even simply images - is laggy and awful. Please fix this EN! Otherwise, great app.
Agreed - EN premium is the best but is seriously lacking in supporting annotation of PDFs. I had to buy PDF Expert to markup my PDFs, then I upload them to EN but I'd much rather not have fragmentation like this. The iPad Pro + Apple pencil + EN with improved pdf annotation (i.e. pdf expert-level) would be unbeatable!