Do any of you actually study economics or have a good understanding of it and still support Marxism and Socialism?

But they do.

This is Marxist economics as descriptive, not normative socialist economics.

*as descriptive science

This thread got me confused about the supply/demand theory and its validity. Can someone explain me whats wrong with it or link me to any critics?

I read "Economics In One Lesson" and it was like a window into the mind of lolberterians, what with all the rants about logical fallacies and muh wealth generation

see

Seen, but what's there to see?

There's no such theory, but there's a theory of general equilibrium.

en.wikipedia.org/wiki/Criticisms_of_neoclassical_economics