There is a huge difference between written English, which is more formal, and spoken English which is assisted by facial expression and inflection. It is fine to end converstional sentences with prepositions. My pet peeve in written and conversational is “this” and “her” and “his”. I end up saying back “her who?” “this what?” a lot.
My pet peeve in written and conversational is “this” and “her” and “his”.