I hate every adult that refuses to try new food
Do you find most adults don't like to take risks?
Yes, they are always afraid of new food.
You shouldn't judge or hate others on what they like or don't like. Not everyone is as adventurous as you when it comes to trying new food. So stop being rude to other people that don't want to do what you want them to.
Nuh, these people are bores.
Not everyone can be free to be adventurous with food. Some flavors are too spicy or people might be allergic to ingredients. It is rather unfair to hate people over  things they cant  change.