Phalanxes too weak?

[Puzz3D]

Cavalry has to be done right as in the texts most battles were won due to the Cavalry which mainly just smashed the enemy's rear and flanks and collapse it.

Flanking with infantry or cavalry was decisive against a phalanx battleline in the battles I've read about. Later generations forgot the lessons of Alexander which was to use combined arms and protect the flanks of the phalanx with other kinds of troops. I think this is the case in RTW, but, given the weakness of the phalanx flanks, it should be better to the front. Historically, it was very good to the front and could fight for a long time, and I don't think that capability is reflected properly in RTW.