That's the trouble. The supposed anti-dumping measures seem to have very little to do with any actual dumping and everything to do with Australian politicians

That's the trouble. The supposed anti-dumping measures seem to have very little to do with any actual dumping and everything to do with Australian politicians daring to criticise China - but because China is a totalitarian dictatorship with no free press, it's impossible to prove it. So letting countries like China enter into FTAs effectively gives them more economic leverage to force democracies like Australia to fall in line, since the whole point is to increase the amount of trade and economic dependency between the countries.