First : Always use OEM Epson ink and Epson cartridges.
Try to use printer at least weekly. Never leave empty cartridges in Printer.
Otherwise ink clogging may occur.
It would appear that your printer may be experiencing ink clogging or clogged Print head.
However having said that, one would think that your Nozzle Check would not appear "Normal".
So, first do a head cleaning
(as instructed in your manual) up to max of three times. Check you print quality
between each cleaning. If print quality remains poor, you may wish to view these videos for some ideas.
https://www.printerforums.net/threads/clogged-print-heads.65647/
View them all before proceeding.
Your other choice is to contact your Epson Service Center.