Yes. More specifically I would say international law is law in name only. It's not really law at all. It's akin to a child asserting rules on a playground with their peers. There is no enforcement mechanism. In reality what we call international law is more like a mutually agreed upon policy, which can also just not be agreed upon at any moment. In fact many countries do not agree to them. There is no government agency or enforcement mechanism over states - that is what makes them states by definition.
I am always shocked by how controversial this take can be.
It’s complicated. While it’s true that there is no direct enforcement, systems of sanctions and embargos have been used to indirectly enforce these agreements. Whether this is ultimately effective is not obvious, but I think “international law does not exist” is a simplistic take, with all due respect for your opinion (which I understand and partially share)
I would disagree, but I admit I am ignorant on the matter, so maybe you can explain to me how that's wrong.
My opinion, with all the caveats that come with an opinion, is that states do organise into over-arching organisations in the context of international laws, such as EU, UN, etc.
Such over-arching organisations do not have the same degree of power that a state has over its citizens, sure, but I think it still qualifies. You can theoretically also "disregard" state law, regional law, etc. The problem with that is that the power disparity is such that you can't hope to get away with it (in a perfect world and in a vacuum, that is, as many people do disregard national law and get away with it :D But thats beside the point, I think you'd agree?)