“Good” is not the metric for preserving things. “Important” is. Marvel’s Avengers is important to preserve because this failure is a major historical milestone.
Like, imagine if somehow every copy of ET for the Atari 2600 vanished. Would anything fun be lost? Of course not. But would we lose some critical context in an important historical event? Yes. Very much so.
Fortunately, Atari games aren’t the kind of ephemeral media where we have to worry about that like cloud-service games or pre-code cellulite films.