When stating that beauty is in the eye of the beholder, you are simply saying that the pleasure you've taken from something is incredibly personal. There is no magic code that can be deciphered to understand why one person might enjoy a piece of art while it revolts another. There is no absolute standard of beauty. Take a quick tour around the world and you'll find how wildly ideals of beauty vary from place to place. A simple example is of how many Caucasian cultures crave a good tan while many Asian culture avoid the sun to maintain as fair a complexion as possible. How's that for irony?
It's easy to label something as beautiful when it's familiar to you. For instance, take the skinny doe eyed models that have been gracing fashion ads for the last 20 years or so. They are accepted as beautiful because you are used to it. However when Kate Moss hit the scenes in the early 90s she was labeled as ugly. This was simply because she had a different ascetic than what was popular at the time. Think about that. Someone that was so different and considered ugly at first eventually became fashionable once the original shock had worn off because people were trained to think it was beautiful.
"Beauty in things exists merely in the mind which contemplates them.” -David Hume
Accepting these negatives, challenge yourself to find beautiful aspects within each and every one of them. Do you dislike an outfit that someone is wearing? Separate it in you mind into isolated pieces and look for something in it which you like. Maybe it isn't for you, but does it look great on them? Perhaps you've never been into redheads but did you ever notice how beautiful her eyes were? Realize that when you label something completely as a negative, you're missing out on the opportunity to find so much more positive within it.
The point is that there is no such thing as beautiful or ugly aside from what society tells you and you accept. The idea of good and bad is just an easy way for your brain to categorize all of the stimulus it receives daily into easier to digest packages. Once you have decided that you like or dislike something it's easy to move on and forget that it even existed. Challenge yourself to view your world more critically.
Try to find something beautiful in every single circumstance you find yourself in. From a snowstorm to traffic jam, there is beauty to be found everywhere if you train yourself to look for it. Even death promises new life if you simply change the lens through which you look at it. Without decay many gorgeous and incredible organisms would not exist. The rotting of life promises they will begin the task of redistributing matter back into the environment thus enabling new life to begin in a fresh cycle. In order for every single living thing on earth to exist, there had to be death before it.
At a time when the media is forcing so much pain and darkness into the consciousness of society, it is more important than ever to choose to seek out the beauty of life. Instead of finding the world to be ugly, realize that it is filled with beauty. This complex gorgeous system is filled with beautiful people, who are creating beautiful art. These people- just like you- are simply seeking to find more beauty in their lives.