There are a few possible explanations for why Demi Moore's daughters might be considered ugly by some people. It could be due to their unique features or it could simply be a matter of taste.
One possibility is that people find Demi Moore's daughters ugly because they have inherited some of her unique physical features. For example, they may have her large eyes, full lips, or high cheekbones. While these are all considered to be attractive features, they can also make someone stand out in a way that some people may consider to be unattractive.
Another possibility is that people's opinions on the attractiveness of Demi Moore's daughters are simply a matter of taste. What one person finds beautiful, another person may find ugly. There is no universally agreed upon definition of beauty, so it is ultimately up to each individual to decide whether or not someone is good looking.