Can a Ender 3 not make a real cylinder?

I made this on my Ender 3 using Thinkercad and Cura as the slicer. I designed it by using the cylinder shape and then "cutting out" a slightly small circumference cylinder. I am still pretty new to this so just curious if an Ender 3 (or any gantry style printers) are able to make a true cylinders or did I just mess up somehow. Thanks!