Sure, it's bad design. You can't easily determine orientation visually even when both parts are in plain sight (you need reasonable eyesight and light to see clearly into the connector).
Of course, you can do it by feel. But if you get it wrong and don't feel the resistance you can push too hard and break the plastic inner thingy (I've done that once). A more resilient form of polarization, such as found on mini-and micro-USB would be an improvement. Of course, somebody stupid enough can still force it in and damage it (3 of my neghbours are prime candidates for doing this).
A better design would be like the power connector on a mac mini - it will go in either way around and you'd have to be really strong and stupid to plug it in at 90 degrees to the correct orientation. But I expect Apple has a patent, trademark and registered design on connectors looking even vaguely like that one.
So live with it being naff. Except it's worse than you thought. The design is such that one of the connectors will wear out a lot quicker than the other. Guess which connector is on the PC and which is on the cheap-to-replace cable.