Self-made/Custom VS Branded Desktop Computers

As far as I have seen

Self-made/Custom Desktop - For those that can fix computer problems themselves and know about how to avoid overheating the computer in general.

Branded Desktop Computers - For total newbies that need the "support" provided by these companies.

Is it generally cheaper to get Self-made/Custom Desktops though?

Build your own machine unless you want some WOP douchebag fresh out of Wootxico Community College to be the guy that selects your components and puts them together.

The difference between the shit they give you and stuff you could buy for yourself is significant. A dell is going to have some crapass 4-4-4-12 timing ram in it and a piece of shit motherboard, guaranteed.