Also, even the technology they are credited with is vastly overrated.

Yes, they invented the crossbow but it really was just a bow on a stick(literally a bow, often repurposed from a bow even). They didn't have dedicated limbs for them, they didn't have any kind of stirrup for a very VERY long time, and even that was just a loop of sting at the end. Up until then(it could even have been the 13th century or later) they were reloding by spanning the bow from their backs using their feet. Even the famous Chi Ko nu was a worthless as anything but a toy, far too weak to be able to do much and the bolts not even being fletched.