It should not be remotely surprising that it is typical of them. The foundation of China's foreign policy is very simple: they're the world's second largest economy (perhaps its third, since most of the past 15 years of economic growth look wildly exaggerated), world's most populated country, and in any way you cut it, a manufacuturing titan. They were isolated for about 40 years and backwards for about 60. They are a huge presence in an international system - from the security perspective, economic perspective and political perspective, that they had no role in making. They want to one day remake, with themselves at the "rightful center".
Like hell the United States lets that happen.
China doesn't follow agreements because it is convinced that the global arena in which these agreements are supposed to operate under is intrinsically unfair to China. This makes China a "revisionist" power (that's a definition to examine).
The "responsible stakeholder" bit emerges from the United States' inherent and cultural tendency to aim for de-escalation. During the Cold War for example, US nuclear strategy was filled with ways of giving the Soviet Union "off ramps" to save face and reduce tension. Soviet nuclear policy did not reciprocate.
The West's aversion to holding China responisible is that doing so would be highly escalatory. The West tactic is to instead discretely cajole and maneuver, rather than deliver ultimatums.
The good news is, this era is ending. In May-June for example, it is expected China will be nailed to the wall by UN Aribtration in the Hauge over it's claims in the SCS in a case brought by the Philippines. The US and it's East-Asian allies have been preparing to label China an international law violator and sully it's reputation on those grounds for months.
The US and EU are preparing their WTO case as well. Why now? Because China wants to move into the world of airplanes to break the Boeing-Airbus duopoly. That's the red line.
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Really would accomplish a lot less than you'd think.
If you want to hurt China, freeze them out of the international bond market. The US could de facto do it by refusing to honor yuan-based transactions and refusing to sell US Treauries to China. You could throw them into recession in days if you really wanted to.
The downside is it would likely lead to another Asian Financial Crisis that would ripple around the world considering how much more integrated the region is than in 1998.