Summarize this article in one sentence.
Don't pontificate about how amazing your writing is. Editors are crafts persons just like writers and they are there to help, not hinder you. They are there to polish the gems and bring them to their shiny potential, hopefully bestselling potential. Embrace this help for all it is worth and let them make their suggestions. Entertain their suggestions seriously.  Friendly editors are useful for easing you into the editing experience. Nasty ones are just nasty and are good for sharpening your wits against and allowing you some self pity. At the end of the day though, look for the ones in between––nice to invite to a dinner party but very fierce about their craft and the ability to make your craft look better. Submit the book to a publisher only if you do not mind having the book edited impersonally. This can be a good or a bad thing, depending on how you choose to view it. On the whole, the experience of that editor and the backing of a publishing house and its already established reputation can only be good for you. There are people who purchase based on who published the book, not just who wrote it. Ultimately, you need to make good judgment calls about what to leave in, what to rewrite and what to pull out, based on your editor's and reviewer's comments. Trust both your own instincts and what they have said, but be careful about both. Your own instinct can sometimes just be stubbornness parading as "truth", while not every reviewer or editor will get the totality of your writing. Try to get some distance from the writing, give yourself time to consider the comments made about it, then come back to it and assemble it for its last phase, the publication.
Let your editors rip the work to pieces. Make essential changes.