The Soviets trademarked that old tactic of only giving the first wave of soldiers guns, so after they died wave 2 would pick them up and go a bit further, wave 3 a bit further after that...Then we had to deal with the same sh** from the Koreans. Unfortunately for the Koreans, Americans just don't lose.
For all the Koreans? I seem to recall a certain “Juche” regime there since the 50s. If “Americans don’t lose”, then Kim Il-sung should have died in a US military prison, preferably by execution. And the Mao regime should have lasted only a few months after they dared to attack US forces—but then Truman made the error of firing MacArthur.
A losing side is a losing side. Numbers tell nothing of the story, nor does technological level. It’s not “quite a beating” if your opponent gets up and finishes you off.