He did. He said in his opinion - the quality was okay with no major issues, especially in a no frills DVD release. Problem with audio and visual appraisal - as you yourself point out succinctly - that quality or platform of the player can make a difference to the viewing experience.
As Hellcat said:
That to me is pretty clear - that the disks are a no frills affair and the video and audio is fine by the reviewers standards with no
major problems on his run. He's hardly suggesting that the DVDs are crystal and perfect, he's just saying the audio and video - in his opinion - worked fine in relation to his expectations with no glaring problems. If your computer shows the glitches, more than you personally expect from a release, I think that's a fair piece of feedback - not so much for the review, but for any other people like yourself who do have higher expectations of these releases than they offer, but I think Hellcat did give an indication that this was a no-frills product.
I must admit, I'd have been very surprised if this had been anything else. I've not seen many decade plus cash-in releases that offer just the bare minimum of DVD features carry any decent transfer - you get very much what you would expect, and if it otherwise, I'm sure the reviewer would be blown back off his chair with surprise and reported this inconsistency with our jaded expectations.
In the end, the demographics who probably read our reviews are either a) people who are caught in the trends and are curious for a cheap fun buy and probably don't have a massive issue with quality, or b) those perfectly used to these sort of releases and from a quick description of the DVD's own qualities a "fine" with no major problems gives a clear message what contextually they can expect; that this post decade old cartoon has had no crystal clean transfer. So in the short space of the review, I think what HC said was fair appraisal and neither group would expect or need much more, unless they were people who had an eye for quality as an important consumer expectation as yourself.
Don't get me wrong, I agree with you that really a DVD release should have better quality than fine - especially if you encountered constant glitches. I just don't get the impression the reviewer caught any on his copy - but its something perhaps potential buyers should be aware of!