Robotech is from the 80s, so I'm not surprised.
Do you mean this?
https://en.wikipedia.org/wiki/Werewolf_%28TV_series%29. That's also from the 80s, and would look terrible.
We're talking apples and oranges here.
I agree, anything pre-2005 looks like crap, and anything non-network and non-primetime from post-2005 looks like crap. You need to DVR or find/buy DVDs for anything else. Only new stuff is excellent, be it from legit sources like iTunes/Amazon/Hulu, or otherwise.
A very few times, you can find an older show in excellent quality, on the official sites like Hulu. Before they encrypted it, I got quite a few great shows from Hulu, like The Munsters Today and Bill and Ted's Excellent Adventures (cartoon).
Texas Rising is a current 8-part miniseries. It has awesome 720p quality available online.