Being under embargo/blockade is not the same as having no state. When the US did the same to Cuba 50 years ago, Cuba didn't magically disappear or become invalid.
Do you know why the US did that to Cuba? They were smuggling missiles in. See a pattern there?
If you have no control of what enters or leaves your territory, no control over the air above your head or the electromagnetic spectrum, and no international passports, I don't see how you can be a state.
The whole point of a state is that it has some effective control.
Do you know why the US did that to Cuba? They were smuggling missiles in. See a pattern there?