I always check out writers who comment on my work. Alas, very occasionally I cannot find anything they have written that I can honestly say anything good about. And in that case, I err on the side of: if you don't have anything good to say, say nothing. There was one who had written an appalling travel story but she did ask for feedback on why her work wasn't getting reads. I spent a long time - a really long time - going through it and making suggestions for how she might alter the piece to improve it. She never responded. I kinda wish I hadn't bothered now.