export to PNG/raster is jaggier than desired

[JohnGreene1]

i'm a new arcgisPro user.

i am trying to export a world borders map to raster format.  i used high image quality and high pixel resolution, but even so, the resulting raster image is pretty jaggy.  i'm using the 'light gray canvas' image of the world as the basemap.  i hope to export the borders shown there to raster.  

can anyone walk me through how to export and preserve pretty good resolution when exporting to raster?  i'm fine to have a giant output file - it can be 5000x10000 pixels (for the whole world).  something around 2000x4000 would have enough res 

[TheodoreF]

Pro 2.2

Layout view, 1:4000, A4 page. Horrible map rendering... All other elements (ie. Legend, text boxes) look fine!

Data view, 1:4000

Data view, 1:1500

Ideally I'd like the quality in the last image to be retained no matter how zoomed in I am.