I agree with the abstract idea of fairness, having rules, etc. But the devil lies in the implementation. A dogmatic free trade order mainly benefits the establishment: the western powers. If China adopts free trade principles in a dogmatic manner then they will be tremendously hurt by it. And it's not like the US plays very fair either: the US outright rejects a lot of international rules. For example there is a US law that declares they will invade the Netherlands if a US person is ever judged by the International Court of Justice.
http://www.diplomatmagazine.eu/2019/02/09/william-pace-the-h...Having ideals is a fine thing but we need to stay realistic. Is it at all possible to create rules that benefit everybody, given that countries differ in development status, culture, values, etc? I have no idea. We can try, we should try, but don't get too surprised if things fall apart sometimes, and when things fall apart it's unhelpful to point fingers.