If your armor/armor plate decay is more than 2% of your total cycle than, as a general rule of thumb, you are hunting bigger than what your current skills (dps and evade/dodge) can comfortably handle.
If you can't hunt smaller, then you can mitigate this by adding an Ares ring (or any offensive type of ring), taking HyperStim/DevaStim pills and/or using a ring/armor with an Evade/Dodge buff. You need to raise your dps and/or increase your Evade/Dodge.
PS: the numbers in your hunting log seem to show your defense costs are below 1% so totally fine.