I didn't have this problem at all
Of course, part of that is that I contacted a few of the civs I wasn't at war with and traded those bonus luxes for iron while swordsmen were the deal of the day
Thanks to that (and the great gold production Indonesia is capable of by selling off luxes) I had enough Kris Swordsmen to get a bunch of the great bonuses like Restless (+1 Move, +1 Attacks), Heroism (Great General-esque bonus), and the like
Once the war was over I canceled the excess iron deals, disbanded the few who had bad statuses, and just kept upgrading the good ones - by the end game I had infantrymen capable of swinging twice or acting like Great Generals that formed a brutal core (along with a nasty air army - I started trading luxes for oil in the modern era)
Of course, part of that is that I contacted a few of the civs I wasn't at war with and traded those bonus luxes for iron while swordsmen were the deal of the day
Thanks to that (and the great gold production Indonesia is capable of by selling off luxes) I had enough Kris Swordsmen to get a bunch of the great bonuses like Restless (+1 Move, +1 Attacks), Heroism (Great General-esque bonus), and the like
Once the war was over I canceled the excess iron deals, disbanded the few who had bad statuses, and just kept upgrading the good ones - by the end game I had infantrymen capable of swinging twice or acting like Great Generals that formed a brutal core (along with a nasty air army - I started trading luxes for oil in the modern era)