The issue of school shootings, and other acts of violence with the sole intent to kill random people. These things happen about once in a decade in most western countries.

Uhh... I already addressed this... The link, if you had read it shows homicide rates per country. Sort by rate, look where your country is compared to the USA... then compared to some other "western" countries. Sort by Region/Subregion... Allow yourself to think about why the US might have problems. The US does have higher rates... The EU itself is surrounded

https://en.wikipedia.org/wiki/List_of_mass_shootings_in_the_United_Kingdom
Not only are mass shootings common...

In no point did i argue about the particular reasons or solutions,

Correct, and I never said you did. I said that the argument I always hear from people who make claims like the USA is fucked up is bullshit. Showing an example of a country over here that's ruled by Britain with British law, doing significantly worse than the USA does. Almost like it's different over here. Probably because the EU is buffered from the third world countries... while the USA is definitely not.

but it is evident that the US is really fucked up in this regard.

It's really not. But see, you never elaborated on what is "unaddressed" either. So there's no way to further this discussion is there?