Who can blame them!
The flip side of this is US isn't signatory to UNCLOS so they can murder whoever they want on the highseas, and in the Hague I guess.
>The Philippine coastguard, in a statement, said a Chinese coastguard ship “fired its water cannon” at the BRP Datu Pagbuaya, a vessel belonging to Manila’s fisheries bureau, at 9:15am (01:15 GMT) on Sunday.
>Minutes later, the same vessel “deliberately rammed” the stern of the Philippine fisheries bureau vessel, causing “minor” damage to the boat.
https://www.aljazeera.com/news/2025/10/12/philippines-accuse...
It's in a similar calibre of official disregard for international law.
However, you're incorrect about it just being fishing vessels and third parties. There are tons of examples of Chinese coast guard and navy ships doing this, its not unmarked fishing vessels or other third parties doing it on behalf of the Chinese state.
https://apnews.com/article/south-china-sea-thitu-island-phil...
From 2024:
https://www.cbsnews.com/news/philippines-china-sea-conflict-...
Another incident in 2024
https://news.usni.org/2024/08/31/chinese-vessels-ram-surroun...
And the very violent Second Thomas Shoal incident:
https://en.wikipedia.org/wiki/June_2024_Second_Thomas_Shoal_...
Whoever told you its just fishing vessels doing this are liars spreading misinformation. It has been official coast guard and naval vessels for years. This is very well documented.
[0]: https://www.abc.net.au/news/2025-08-11/chinese-boats-collide...
Xi’s China has been ramming vessels in the South China Sea for a while now [1]. In 2019, “a Philippine fishing boat anchored in Reed Bank in the South China Sea, sank after it was rammed by a Chinese vessel,” its crew surviving because they were “later rescued by a Vietnamese fishing vessel” [2]. (“In July 2016, the Permanent Court of Arbitration at The Hague ruled on a claim brought against China by the Philippines under UNCLOS, ruling in favor of the Philippines on almost every count. While China is a signatory to the treaty establishing the tribunal, it refuses to accept the court’s authority” [3].)
Russia, meanwhile, conducts extrajudicial atrocities in Africa through Wagner [4].
The simple answer is the great powers are broadly and consistently rejecting the notion of international law.
[1] https://www.reuters.com/world/china/philippines-accuses-chin...
[2] https://en.wikipedia.org/wiki/2019_Reed_Bank_incident#:~:tex...
[3] https://www.cfr.org/global-conflict-tracker/conflict/territo...
[4] https://www.hrw.org/news/2024/03/28/mali-army-wagner-group-a...