how to print sharp vectors

I'm printing a vector file (it is a vector, I created it) from illustrator with a Canon inkjet on photographic paper. Whatever settings I use the vector and type prints pixelated.

I've tried numerous times even setting raster effects to 300dpi even though there's no effects on the artwork.

I saved my artwork to test as print-ready pdf and printed from Acrobat...hey my artwork is sharp as intended! Just one problem, Acrobat doesn't allow me to print borderless... I tried printing the same pdf from illustrator and we're back to pixelation.

What is going on here? 

I used to be a graphic designer and prepare artwork for print, I never had this problem which is proving to be very expensive.

Can someone detail exactly what all settings should be so that a circle is a circle? I'm starting to suspect this is a bug...