Keep your story straight, flash. First you claim claimant countries that are no peer to China are doing something meaningful now, then you claim that over 10 years ago when the Chinese presence was dredging barges nothing could have been done.
Here are the Vietnamese not confronting the Chinese in the SCS.
As to your comment regarding SLOC, I say, for now. If they chose to in the future they now have established military and logistics capability to interfer with far greater ease than before.
Your Trump frustration is showing. Very much beneath you and not germane to the debate at hand.