From the US intervention in Vietnam or the Soviet Union's intervention in Afghanistan, history has proven that when interfering with a country's sovereignty or supporting a leader, the consequences will be completely different from what we imagine.
Supporting Duterte will not necessarily change the Philippines’ hostile attitude towards China. Perhaps the Philippines can control its hostile attitude towards China in three to five years, but can China find another Duterte in 30 to 50 years? Only if China works hard to develop itself and drives the development of its neighboring countries together can the problem be solved.