I'm not going to let my wife have certain snacks because of the way she eats them
I hope you're kidding. What about the way she eats them bothers you?
She eats them so loudly and I hate it so much and I told her and she keeps doing it.
Your wife has the right to eat what she wants and you can't police her. You should go to another room if her eating annoys you so much.
But she's so noisy and annoying!
I'm sorry you find her eating annoying, but that's your issue, not hers. She can eat what she likes, and you can't prevent her from doing so. I recommend you learn to ignore it if it bothers you so much.