I've found myself passing on quite a few queries I feel in my soul MIGHT have potential, but the query itself just turns me off. Two of my favorite people outline what is hurting your query letter. I super recommend checking it out, especially if you want to query me in a month https://twitter.com/BookEndsJessica/status/1322211626758610944

Things that turn me off the most:
1. You're self-deprecating and want me to validate you by offering rep.
2. You insult other authors or a genre
3. You are way too vague, especially in fantasy pitching
4. The hook is kept a mystery with "their world will change, or will it?"

5. Word counts extremely out of the margins of your genre
6. Trying to guilt me into offering rep through personal things you know about me. I love personal notes, but not when used against me.
7. Patronizing me by claiming my list isn't good enough yet
8. 1000 word long queries

9. Spending too much time outlining general themes and not plot. My mind will skim and I won’t be invested
10. Your bio is longer than your pitch
11. You insult the intelligence of the reader (I love MG so don’t make it seem like you are writing for people lesser than you)