Please stop putting compliments in rejection letters. After we get the fourth one, or so, we are going to automatically assume that it's a form, that you say that to everybody. Ergo, compliments in rejections are a waste of time, energy and space, respectively yours, mine and the universe's. If my writing were worth complimenting, you would have read more. In fact, when rejecting, start with the word "Sorry". Wading through three sentences of cheerful, fluffy false-praise (and I don't give a fuck if you really DID write something personal or not. I AM ASSUMING IT IS FORM NO MATTER WHAT) to get to the "no" does very unpleasant things with my brain and blood pressure. SAY NO, SIMPLICITY WILL NOT HURT YOU.
Also, remember dating, and how you do not say "Well, I'm sure you'll find someone (ELSE) who is very nice, eventually" to the other during the breakup process? Because this is apparently stupid and trite and it only makes YOU feel better, and not the ex-SO you just broke up with? Please transpose this information over into rejection letters. You know the phrase, "Remember, this is just my subjective opinion"? STOP SAYING THAT. IT DOES NOT FUCKING WORK.
P.S. Yes, I know we writer-types are supposed to pretend like we've never been rejected at all so you don't have to think about it. But you and I both know writers get enough rejections to fill a swimming pool, so pardon me if I want to wade in mine a little bit.