Everyone hates something or someone.
Think about it for a moment: In the world, there is an endless variety of things that cause us to cringe. For some it might be going to the dentist. For others it might be a particular food.
Some of us hate narcissists who only speak/care for themselves. Some of us hate people in our office who have jumped ahead of us on the corporate ladder.
Because it is natural to hate, your character must have strong dislikes.
Your task is to make a list of things that annoy your character. Come up with at least five different categories. Then narrow it down to the one that you can incorporate into a scene.
Choose the one that makes you the most passionate. Your feelings will impact your character’s reactions, so this is why it’s important to select one that really irks you.
After you’ve established that which your character hates, write the scene in which the hated object appears. Be sure to include sensory markers. We need to feel the character’s anguish through sight, smell, taste, touch, sound.
When you are finished, reread to see if the hate comes forth. If it does, then you have accomplished the task. If it doesn’t, then what do you need to do to strengthen the emotional response?
This will not be an easy task.
Have fun with it anyway!