(Almost all the movies listed have at least 1 if not several good parts to them (whether it be 'style', character design, music, etc). A lot of these shows also suffer from the fact that they were left incomplete due to lack of funds, etc, especially the various OVAs.)
In no particular order: Old School Anime in desperate need of a MiSTing-
Project A-ko
Hakkenden
Wicked City
Bubblegum Crash
AD Police Files
They Were Eleven (this is actually a pretty interesting show, especially if you can find the dorama versions)
Nightwalker
Cyber City Oedo 808
A Wind Named Amnesia
Armitage III
DNAČ
Megazone 23
Hades Project Zeorymer
Gall Force (I forget which movie was released in America, but they are all bad
)
Heroic Legend of Arslan
Moldiver
Detonator Orgun
Photon
Garzey's Wing
Vampire Princess Miyu
Darkside Blues
Demon City Shinjuku
Burn Up! series
and quite possibly the worst (non-ero/hentai) anime movie ever
Odin: Photon Sailer Starlight.
It should be noted that almost anything from AIC from the 1980s are just...just awful. So start there for some "bad" anime (I already listed several in my above list). Most titles done by J.C. Staff are also god awful.