Yes the national electoral calculus in the last 15 years has turned against the ALP. in 2007, Kevin Rudd's ALP got 43.4 of the primary vote. This election it was 32.8%
Australia's voting system is beautiful in that it allows to see further than these FPTP considerations.
Since 2007, 12 percent of the population has found it prefers Green first, then Labour second, but never Liberal. Green+ALP FP has been steady at 44% for 4 elections.
Meanwhile, where's the Coalition's hidden vein of voters after losing nearly 10% of FP since 2013? Katter's Party?