As per
your last thread on the topic:
1.
She's a woman. Wonder Woman is rarely respected herself, why would her arch-nemesis be any different? Comic books in general don't really take female villains as seriously as male ones; look at Marvel - what big-name female villains do they actually even have? Mystique, maybe, but she's certainly not a powerhouse like Cheetah. And I've often thought that the rest of WW's rogues gallery is derided because they're 95% female, too.
2.
She's cat-themed. Catwoman is a more famous cat-themed character, and she's just a woman wearing a costume. A lot of people (creators included) also only remember Cheetah from Challenge of the Super Friends, where she was basically Catwoman in a cheetah costume. DC editors must be guilty of this, too, since they continue to allow writers to use the character in ways that don't emphasize her godly powers.
3.
People don't read Wonder Woman. Okay, that's hyperbole, obviously Wonder Woman has a ton of fans. But her comics aren't as widely-received as Superman's or Batman's, so that has an effect on her mythos as a whole. Cheetah is actually pretty well-respected in Wonder Woman comics (for the most part, of course), but because the comic doesn't get the traffic that other male superheroes' gets, people aren't able to see Cheetah's power levels the way we do.
4.
Her inconsistent origins. This goes kind of hand-in-hand with point #2 - Cheetah has had as many interpretations and re-imaginings as Wonder Woman herself has had. Priscilla Rich was a wealthy socialite with an inferiority complex. In the Silver Age, Debbi Domaine was a brainwashed eco-terrorist. Post-Crisis, Barbara Ann Minerva was a devious archeologist who craved power. The New 52 had her in a cult dedicated to the Goddess of the Hunt. Rebirth had her as Diana's BFF who blames her for her cursed transformation. There are so many origins that it's hard to remember which one is current, though most of us agree her current version is the best she's had since the 40's. But it's still relatively recent, so it hasn't crossed over as quickly to outside media.