Trump has been the greatest threat to the western world (particularly Australia) over the last 80 years as he has broken / trashed many western alliances all the while China continues to build while encourages the divisions both in the alliances and domestically Rome burns while Trump praises himself.
Trump BTW has done the same internally in the US there is no longer a team America.
How much were UN countries spending on defence before Trump?
He told them to pull their weight. He also boosted military spending after it was trashed after Obama. Those "alliances" you mentioned were coasting on the hope that US would keep wasting defense dollars protecting them with little in return.
Russia didn't walk into the Ukraine on Trumps watch either.
Trump has been in for less then 4 years, yet you are blaming him for problems decades in the making.
Yep