good on you for confessing! I used to be the same.
Now with my third child I hope that I have no one under any illusions that my kids are angels all the time! They are NOT!
My 5yo DS still throws wobblies if my 14yo DD looks at him when he eats. And SHE throws wobblies and threatens to leave the table if she HEARS him eat! My 3yo sits between them stirring them BOTH up too!