Been nice is actually very easy and healthy:)
It's 2018 and if you still act like a cave man nobody can help you.
It could be social environment,bad family relations or just boring what makes you act like neanderthal but it is still monkey behavior.
Everybody make mistakes,when it comes to art sometimes wrong things could be even more interesting and beautiful than normal stuff ,so please be nice when ask,demand or criticize,there is no developer of whatever he/she develop who will say ' I don't care' about your opinion',cuz we put part of our emotions,soul and spirit in what we do,naturally nobody and nothing is perfect,everything start with imperfections,just in time some people get closer to perfection than other following their dreams or ideals in personal or professional direction
Smile is better then anger,love better than hate - make art,not wars :)Cheerz