@MasterOfTheWind

I think what you are trying to do is very complicated and you have to have quite some knowledge to get this working.
So many people can't help you with that.

Have you looked into an easier solution ?
You can use the "CVBS/Composite Video" output of the Raspberry pi if your TV supports it.
The the quality of the CVBS/Composite video signal is quite acceptable on an old TV.

@melvin-fox The diagram is on the original post but I will link it here in case you missed it:
http://www.geocities.ws/podernixie/htpc/vga2euro.gif
Anyway you just don't join the Hsync and Vsync together, you must put a 1k resistor on each line before combining them together.