[HELP] Please help me deinterlace my stupid NTSC DVD cartoons

[Selur]

for me it looks like the blurred image on the web site (= 1st image of "Deinterlacing methods"), no ?

That image shows the output of the deinterlacer not the input, so applying a deinterlacer again on that output doesn't make sense.

OK, i agree that we don't see "lines" ie. "mice teeth"...

That and that the content isn't flagged as interlaced should be a good hint that it isn't.
When there are no visible separated fields, deinterlacing is usually the wrong approach.

-> try using: Vapoursynth->Other->Restore->sRestore with 'Frate' enabled and set to 24 (or 25 or 23.976).
This will try to reduce the ghosting and output the selected frame rate of images without ghosting.

Cu Selur