I would ask you to take a step back and think about what kind of society you actually want to live in and how you could get there over the long term?
I think that's key to the point though.
I truly believe that the murder rate of a country is largely irrelevant to it's gun laws - it's cultural and people intent on killing will do so with whatever weapons are available.
Even if that weren't the case though. realistically most people here seem to be fine with our gun laws. As you say, our laws are some of the most lax, but is it so terrible that for people who WANT to be able to own and use guns, that we have at least one country that we can do so in? For anyone who wants strict firearms regulations they have a ton of options to choose from. Or heck at a minimum leave it up to the individual states and let them decide for themselves.