Writer's groups work for some new writers, not for others. I was never cut out for a writer's group. So much depends on the people in it. What are they criticizing about your work? Grammar, syntax, plot holes? Or are they criticizing your personal style, your world view and your personal philosophy? If they're criticizing the latter, it's not a good group for you, no matter what support you might think you're getting from it. Your style, your perspective, and your philosophy of life are the main things you have to sell; they are what make you different, and you shouldn't--in fact you can't--change them.