Anyone can negatively criticize - it is the cheapest of all comment because it requires not a modicum of the effort that suggestion requires.
“From my earliest days I have enjoyed an attractive impediment in my speech. I have never permitted the use of the word stammer. I can't say it myself.”
“If you have not been a villain at a certain point in time, you will never be a hero. And the day you are a hero, you may become a villain the next day.”