Have a thick skin. If you have a fragile psyche....stay out of the business. No matter what you write, how well you write it, or how good it actually may be....there will always, always, ALWAYS!....be people that want to criticize it, bash it, trash you, or try to knock you down. Unfortunately, that is the society we're living in right now in America. Be prepared to ignore it, and if you can't....stay away from publishing your writing, and focus on building up your mental strength instead.