My army was entirely Ashigaru (four spearmen, four swordsmen, threearchers, if I remember correctly) but the only reason I won my two battles was the enemy rather foolishly fielded all cavalry armies and expected me to not live through the shock. My archers took the brunt of it and my 3 chevron Spear Ashigaru took care of them handily both times. I also had four units of hired sword Ashigaru, but it turns out that when the enemy deploys a moral dampener retinue against you and charges your army with three Katana Samurai EVERYTHING ROUTS FOREVER INSTANTLY.
So I'm learning.
Yeah more or less. The bane of ashigaru armies are matchlocks and all the super dps units like monks.
I highly recommend getting samurai katana ASAP for that reason.
But then once in awhile you'll meet the jerkwad players who see they're fighting a super low level player and only field super hero units. As in, the hero hero units max levelled etc etc. It takes 200 of your men to kill one of theirs, and their units are immune to morale loss. How can a level 1 or 2 even fight that? There are literally no units available to low level players to deal with units that are immune to morale shocks.
I stopped playing the multiplayer for that very reason. It's that because you can't know what the enemy player is fielding, games are more or less always a crapshoot where you have to hope your army is not outmatched because of selection.