I'm not sure if this is part of the problem or not, but my old HP printer would continue to print even if there wasn't enough ink to properly get the correct color. In other words, that was the indicator that you ink was ready to be changed. When the colors came out faded, put in a new ink cartridge. Not a good system, but it was an old printer. My new Cannon will not print anything unless there is enough ink to get the proper quality.
Are the other covers in the picture original PS2 games, or are they printed as well? I'll have to take a picture of some of my PS2 prints next to origninals to see how much of a difference there is.
The only other thing I can think of is double check your print settings. When I switched to Windows 10, I lost a lot of my modified settings in my print and scan programs. They all went back to default and I have to figure out how I had everything setup before. I didn't loose all settings however, which I thought was odd.