Why do democrats hate the free market and support social services?

[Entropy]

That generalization is dangerous. While there are elements of truth in it, it is hyperbolic and describes a position more radical than most actual Democrats would support.

However, many Democrats are CRITICAL of free markets because free markets tend to distribute wealth unequally, and this creates feelings of resentment and jealousy that are the underpinnings of class warfare.

But it is important to realize that most well-informed Democrats do not want to eliminate free markets. They recognize that the wealth creation engine of markets is irreplaceable. Instead they want to temper it and manipulate it to correct what they see as it's faults.

Of course these efforts impose inefficiencies and distortions that undermine free markets nature as a wealth creating engine, thereby making the society as a whole poorer.