Give up being gutted when someone doesn't love what you write. It just wastes time. No writer in history can claim that they were universally loved. Seriously. It really, really wastes precious writing time!

"To write books for others to read is to put your thoughts into other people's minds. Choose what you put in there with care."
(This is very good advice!)

"Writing is like music. It's the rhythm that makes the words sing." 
Get someone to read your writing out loud to you and listen for the rhythm that the words create. It's the rhythm that carries your words to the reader.