Talán találtam egy megoldás félét a grafikai problémádra:
The Blender screen is blurred and unreadable. What can I do?
This problem is caused by having hardware anti-aliasing turned on for OpenGL applications. Since Blender uses OpenGL for its 2D display, anti-aliasing will interfere with Blender's operation. Please turn off OpenGL anti-aliasing in your graphics card driver settings to correct this behaviour. See here for more information on graphics card configuration.