For other people looking for where their EN data is located, mine was not in Application Support but here...
/Users/tomn/Library/Containers/com.evernote.Evernote
I'm assuming that this was migrated here at some point when upgrading to a new version of evernote. It's a bit odd because within the directory com.evernote.Evernote has a directory structure (not the files just structure) of my user account including, documents, desktop, library, applications support... then inside that Library you can find application support/evernote/ From here your data seems scattered across some directories but the largest is this...
/Users/tomn/Library/Containers/com.evernote.Evernote/Data/Library/Application Support/Evernote/resource-cache
Although there's some other directories where I can actually see some note attachments and the notes themeselves. Some are new and some are old. It's possible those are notes with attachments that are shared with another user (my wife).Some were new notes and some were old. Those you can actually see and open the file attachment (eg. a PDF...) whereas that directory above has all of the notes with attachments encrypted. (you can't see note name, content...) but it was 9GB so assume this is where a majority of my data is located.
I suspect which version of Evernote you started with and migrated versions over the years ends up placing your EN data in different places and not simply in user/library/application support. Also, if you used the macos migration assistant over the years and not start from scratch and install EN... you would get different results.