This question keeps reappearing in various guises: How do you help someone whose work isn’t very good? Simply saying “This sucks” isn’t helpful and is usually taken with offense. A sufficiently screwed up work may also be unrecoverable. But making minor changes and saying, “It’s great!” often isn’t helpful either, because the work isn’t great and false praise is a lie. Those seeking criticism should be tactful enough not to ask, “Is it good?”, but often they aren’t and it leaves critics and editors in an awkward position.
I’m a writer, so I tend to see stuff from bad writers, but the same principles apply to other people with other domains of expertise. I developed my method of commenting on bad writing years ago, when a former student and now friend asked me to read a few stories she’d written for a creative writing class. Given her age they weren’t terrible; I made some comments, fixed a couple of minor things, and suggested some books that might speak to her.*
She asked if I thought the stories were good, but fortunately she asked via email so I had a few minutes to think about my response. I replied that I’d reframe the question: if she keeps writing, reading about writing, and developing her own sense of good writing, in four or five years she’ll reread her stories and be able to decide for herself whether her work was any good. I mentioned that when I was 26 or so, I no longer thought the stuff I’d written from 18 – 22 was any good. She got the point, I think, and seemed to appreciate what I was saying without saying.
And what I told her was and is true: I don’t think much of that early work now. But I also wouldn’t be where I am today without having written what I did then. In addition to being true, that sort of advice has the advantage of being tactful. I think John Irving said that every writer who seeks feedback really wants to be told, “It’s perfect. Don’t change a thing.” But of course nothing is perfect and editors exist for a reason (so do therapists; the reasons may be more closely related than we’d like to commonly assume).
* Anyone interested in writing ought to look at this list, which I still think good. I periodically re-read every book on it. In some sense no good writer ever fully stops being a beginner.