Is state sovereignty under attack in the 21ce?

State sovereignty is a concept that was established after the 1648 peace of Westphalia, which created the principle that governments within a state were the only legitimate force of power and wouldn't interfere in other states domestic interactions. This concept is known as Westphalian Sovereignty. However, according to Richard Haass state sovereignty is under attack from below by guerrilla and terror groups such as ISIS or the Boko Haram, from the side by NGO's such as amnesty international or Greenpeace and from above from supra-national organisations such as the UN or EU.
In contrast, there is a state sovereignty resurgence, as seen by recent politcal events such as Brexit or the Russian internet sovereignty laws. Brexit is an example of a state sovereignty resurgence as the smaller British state, via a democratic mandate is attempting to detach itself from the wider supranational organisation of the EU. Which demonstrates a resurgence in state sovereignty as nation state is minimising the powers of supranational organisations whilst maximising its own governments power to self determination over itself.