This is primarily due to the dreaded clipping issue that has been uneradicable since the introduction of the hoplite phalanx formation -- hoplites will melt/clip right through a line of phalanx pikemen, killing half of them and glitching the entire battle.
Even when this does not happen, the hoplites' janky maneuvering often puts them diagonally positioned to a phalanx line -- I'm seeing rank 4 Chalkaspides get 20-30 kills max against ordinary hoplite units. This leads to the perverse and ironic result that the Macedonian phalanx is most useful against troops like Roman Principes or Gallic swordsmen, the very enemies it struggled most to defeat in real life. While the formation it was specifically designed to defeat massacres it with relative ease.
I'm sure this must drive Kam and the developers crazy hearing about this same issue repeatedly, but it really is an insane obstacle and makes playing my favorite types of faction a great deal less fun. Hoplites functioned much better under the previous Formation Attack system, and I recall my pikemen doing rather well under those circumstances. They should not be losing frontal combats to hoplites with 8-foot spears, especially if they're tier one generic hoplites. Spartans or Sacred Band I could at least understand.
If Alexander and Philip were using the current DeI system, Chaeronea would have been a massive Theban and Athenian victory.
Does this happen to anyone else? I love this most recent version, but there are some warts in this specific instance.