cylinders messed up after rotating

[Luke]

I'm trying to make handrails with cylinders, but when i rotate the cylinder to the angle needed, it goes weird, as u can see in the pic..
I've tried using the surface inspector, and selected "natural" but that don't work, i think the cylinder is getting fucked up when its rotated, but i don't know how. i tried remaking them a few times but same thing happens.

Any advice, thanks in advance

[Drofder2004]

Angles other than 45/90/135/180/225/270/315/360(0) are bad

Try remaking, if it keep screwing up, then settle for squares