For me the issues are the constant bugs.
Windows editor bugs with cursors jumping around,
Windows inconsistent behaviour especially with check-boxes, bullet lists and indenting (and combining these, OMG!),
Windows drag and drop of files in and out of EN works one version and is broken the next, also often places files not where dropped,
the sync issues,
The Windows app freezing for seconds at a time, and sometimes just closes itself
The android app display reminders in the list when there aren't any
Android app notifications come up if you change the reminder time in another app before the notification time was due
Android app widget shows ALL future reminders rather than just the same as the app settings (it used to mimic and worked fine)
Work chat is useless.
Tagging of shared notes doesn't work (ie I can't tag notes in a notebook that is shared with me)
Saved searches is missing some key functions like AND and OR's (you're forced into one or the other)
Bugs in saved searches, sometimes it displays things you don't expect, hit the same search again and it is correct
Still can't have more than one layer of stacking notebooks or stacks
No native google calendar integration (Cronofy works ok, but does shift my reminders by minutes at times for no reason)
Doesn't have the editing and tagging functions within a note like OneNote (which would be very welcome)
Rick click menu in tables is different to in normal editor (ie no access to right click, attach files in there)
Google integration is hit and miss, sometimes it displays rich links, other times just shows error
I'm sure there is more I can't think of right now...
Sure there are probably three times this list in features that are awesome with Evernote! I've used it for almost 10 years!! But it has deteriorated so much in recent times. At a time when other products have improved to the point they can take it's crown.