Honestly, I see nothing wrong with calling a spade a spade, regardless of who you are. If I was just starting out in the industry, I would keep my head down to avoid ending up like Azealia Banks, but as soon as I was established, if I have a problem with another artist, you can be sure that I will make it VERY well known that I dislike that person, and I will categorically list each and every thing I dislike about that person.
That will only harm you in the end, so no. I would be nice and classy. I have no need to put down anyone, even if they shade me or anything. People who do that are insecure.