"The veggies in your sauces and stuff- cook that shit first. Do not add raw onions to already simmering tomato sauce and expect it to taste good. Also, huge amounts of random spices make food taste bad. Learn what they are and where to use them."
I think you got downvoted because you were not polite.
Not because what you tried to say is untrue.
I’m an American and I guarantee I’m a better cook than you.
For what it's worth an american just won a worldwide chef contest on Netflix consisting of the best chefs in the world.
I should point out that he was classically trained in French cuisine.