In terms of church law, yeah, the women didn't know much, plus all the positions were filled by men, so women wouldn't have known proper law
Yeah, the amalek were pretty fucked
Notice how it says servant. People would hire themselves out if they had no other jobs or money, they were the person's property. It also says to let them go after a while, which is hardly slavery.
And I don't feel bad.

Read your own comment. Can't you see your own illogicality?
Do I even have to address the fact that you haven't considered that maybe the Amalek infants/children were savable, and capable of living a fulfilled live other than being brutally and painfully killed to death.
You're generalizing things, and God of all things shouldn't generalize people!