Why the fuck are these companies so comically evil? Have you read these robobrain entries?

Are synths reverse robobrains, with organic bodies and synthetic processing core, or are they synthetic people with cybernetic implants in the head that turn them into switchable slaves? Pinkerton in fo3 says the first, but so far in fo4 it looks like the second one is true.

I believe the BoS is the worst implemented faction, with the minutemen close second.
You are a father looking for your son.
You meet the minutemen, you might join them to have somebody helping you, but you already go out of your path with that.
Then you hear the BoS SOS, you go there to help. They say to a pre-war dude that they work to keep the wasteland "safe" by halting all technological progress. To join them, you have to leave your son quest and accept mercenary work. Afterwards they never promise you help, you mention your son once and they say "i'm sorry, but go kill these muties". You are bounded to a faction that orders you around and that doesn't give a fuck about your son.
Even when you look for help for building the interceptor, the MC doesn't know how technologically prepared the BoS. The railroad that decoded the courser chip looks like the best ally.
You have to break immersion to join the BoS. If you play with the "pre-war father in the wasteland" mentality, you don't really have a reason to become one of them.

They are retarded, that's what they are.
Without a fully functioning body, you can't have biological cells at all, they just would decompose really fucking fast.
But with all the cybernetic shit they have inside of them, that's not a possibility.

So what you have is fake skin, hair, nails, etc. Which really raises the fucking question on how they manage to hide among humans when a single cut without bleeding or even bleeding green fluid\oil would reveal them to not be humans.

Funny android test: slice someone's harm, see if they bleed.

The companies are evil because they were modeled after real life companies like EA, East India Company, Activision. But their goals were idealistic and not economic - since the world doesn't have an economy.