My sincere apologies if I'm going to insult some gamers or mods of various gaming websites but negative criticism can be constructive.
I'm routinely called a troll and banned in various gaming sites for offering negative criticism in a polite, non-personal and constructive manner. I believe those people have learned the meaning of constructive criticism but they stretched it to its limits to satisfy their needs of very minimal negative criticism.
Constructive criticism does not mean "extreme politeness", it does not mean "limited negativity in arguments". It means I am not going to become negative on feelings, I'm not going to go personal on any individual, I am not going to go on a drama trip. I am going to offer arguments towards improving a concept without dramatizing it.
But I have every right to use a plethora of negative arguments for a concept I disagree with. There is no rule saying "I must be limited in the extend I'm going to go negative", there is no rule "you must be extremely polite and remind the Queen of England".
The hypocritical stance of people is exposed when they dismiss, call trolling or ban people that use negative constructive criticism but they allow positive nonconstructive commenting.
Positive nonconstructive commenting is when you say something positive but you offer no reason why you support it. This is not a reason to dismiss it or attack it, but it certainly has no value in a framework where arguments are required. Instead negative nonconstructive comments may be attacked as unequal while in reality, both types are useless.
So please, make some effort, think about it and realize negative criticism can be constructive. I know it may be hard to accept it if it's your "baby" what is being discussed, but you can't expect a discussion to reach high quality in outcomes when you shut down negative criticism that is constructive. Because in that case the drama did not come from the creator of the criticism but from the inherent attributes of the receiver.