We went from 18 mass shootings every year to zero mass shootings in 20 years. Hell, we even had a mass shooter literally go to another country just to do his mass shooting and then Null told their government to go fuck themselves instead of mine. If it wasn't for gun control, Australia would be the shithole country Null made fun of on the internet.
It's embarrassing when leftoids try to pretend that gun control in Australia lowered crime (it did not, it just converted gu crimes into knife and hammer crimes), but one thing it did accomplish, undeniably, was put an immediate end to weirdo loners getting mad at the world and killing a bunch of random people. You can bring up Australian statistics to show the results of a sudden application of strict gun control, but if you think they completely support one position or the other, you're deliberately misusing the data.
Gun control doesn't stop domestic murders or gang murders or bank robberies going wrong and getting a bit rooty tooty, but it 100% puts an end to mass shootings, which is why Australia enacted it in the first place. By that metric, it's been a success for us, and as a country that never had particularly high gun ownership or much of a gun-owning culture, the vast majority of people here are quite happy with it.