The Austro-Hungarian army, divided into six armies since the war's start, consistently maintaining between 3.2 and 4 million troops.
In my view, they were clearly weak.
There are several reasons for this, and first, as can be seen from the name "Austria-Hungary," they are a multi-ethnic state.
"The languages used in the military are different."
Using a total of eleven languages. Broadly speaking, five main ones: Austrian, German, Hungarian, Croatian, and Slovak.
While the Dual Monarchy's navy at least moves as one body, having designated German as their common language long ago, the army does not.
Befitting a country formed by various nations gathering under the Habsburg family, that country was clearly divided into Hungarian army, Austrian army, and Croatian army.
From command structure and organization to objectives. There's no internal consistency.