One of the worst Byrne collaborations was MARVEL TEAM-UP 70, inked by Tony DeZuniga. What the heck were they thinking?
DeZuniga's style completely eclipses Byrne's. You can barely tell it's Byrne art.

Likewise in 1980, the UNTOLD LEGEND OF THE BATMAN miniseries 1-3, where Byrne is inked by Aparo. I love both separately, but again in this example, Byrne's style is completely beyond recognition under Aparo's inks.
The story likewise uses an implausible case of amnesia, that makes it WTF-worthy.

It doesn't look bad, it just looks like Aparo, without the slightest trace of Byrne.