Welcome, Malamute. I hear ya, about gaining self-confidence.
But before you waste any neurochemical output on that particular editor, let an old woman tell you a story.
I started querying my debut M/M erotic romance novel to seven publishers in early 2012, after realizing that at that time, there were NO qualified agents open to both that genre and unsolicited queries. Some publishers said 'No'. Two said 'Maybe', with the caveat that I fix certain things. Loose Id wanted to keep more of the story, so I said 'Yes' to them and began the mad scramble to get an agent's help on the contract. (Yes, I did need it.)
But two weeks before LI offered, one of the declining publishers did so with a rejection letter that put my blood pressure through the roof. I thought the editor's comments proved they hadn't read any of the damn synopsis, and barely skimmed the sample text (which, due to their guidelines, just had to stop in the most gut-wrenching part of the book).
I'd believed this publisher when they said they wanted strong crossovers with romance and science fiction. I'd handed it to them - and they said 'we don't publish rape fantasy' and kicked it back to me.
Yeah, I was furious. For about a week. Then my F*****U filters kicked in.
Six months later I was published. A year later, I realized the declining editor had inadvertently saved my debut novel from a slow death with an incompetent publisher, and I got LI's great support instead. And much better sales numbers. If I ever see her at a con, I owe that editor a drink and many, many thanks.
Time does change perception.