What irritates me about that particular talking point, besides how contrived and stupid it is, is that the people who espouse it are basically saying, "if you didn't get hurt or killed by a gun, fuck you because you don't matter."
I haven't heard anyone saying that, and I certainly don't think it's what the GP said. What a lot of gun control activists do say is that if more people are armed then more confrontations will end up with someone being injured, and if more people are armed with particularly effective weapons like guns, more confrontations will end with someone seriously injured or dead.
FYI, a number of those nations with lower gun death rates have exponentially higher rape and violent mugging rates. So "less guns" doesn't equate to the chocolate-rainbows-and-sexy-unicorns utopia that busybodies seem to think it would.
First, it's worth pointing out that rape and violent crime rates are much more difficult to compare than murder rates - in a Western democracy a murder is likely to get recorded as a murder, while reporting rates and definitions of rape and violent crime can vary.
Second, which are these countries? If you were thinking of Canada - the GP's example - the top two results on Google (I didn't check any further) agree that the rates of murder, rape, violent crime and overall crime are all lower.
I'm sure you can find some countries that do worse than the US on some measures. But if that's your argument - that if you're allowed to pick which country to compare the US to, and if you're allowed to pick what to compare them on, then you can find examples that are worse - then you don't have much of an argument.