Oh lol
I just read something about the NTSC DVD releases (I was curious about any regional differences)...
For the purely live-action scenes, rather than using the film negatives, "Warners had even forgotten that they had those. They used PAL versions and converted them to NTSC for the US market. They actually didn't go back and retransfer the shows."
That might be why it doesn't look good for you. Conversion from 576 to 480. Our DVDs probably look better...I've watched my set quite a bit and it looks better than what I remember being broadcast, even without upscaling. As for the CGI scenes, yeah, it's looking very old now but the cropping and stretching does it no justice.