Luderart, 'standing up' for your own music works for you so long as your music has no basic theoretical mistakes such as those in voice-leading and harmony, etc. Do you know that you were really bold to call your piece a 'great' song? :o Despite the obvious mistakes? Well it may be fine since you were ignorant about it, but after advices given from the previous posts, shouldn't you thank each of them since they helped you to spot your errors? As a composer, we must learn humility.
Some people may give harsh criticisms, that's okay, because they are constructive and will give you a mini wake-up call. You should be appreciative of them and learn how to make use of these feedback to the benefit of your development as a composer. I understand that you will naturally take pride in whatever music you create (I do, too! :P Who doesn't?), but not all of the things we do are perfect and there is always room for improvements. This has already turned into an argumentative combat, and you need to be more receptive. =]
:) All the best! With more practices and theoretical understanding, I believe you'll compose even better music in the future!
By the way, I've found a nice Ute prayer to summarise things up.
Earth, Teach Me
"Earth teach me quiet ~ as the grasses are still with new light.
Earth teach me suffering ~ as old stones suffer with memory.
Earth teach me humility ~ as blossoms are humble with beginning.
Earth teach me caring ~ as mothers nurture their young.
Earth teach me courage ~ as the tree that stands alone.
Earth teach me limitation ~ as the ant that crawls on the ground.
Earth teach me freedom ~ as the eagle that soars in the sky.
Earth teach me acceptance ~ as the leaves that die each fall.
Earth teach me renewal ~ as the seed that rises in the spring.
Earth teach me to forget myself ~ as melted snow forgets its life.
Earth teach me to remember kindness ~ as dry fields weep with rain."
Key words: "quiet", "suffering", "humility", "caring", "limitation", "acceptance", "renewal", "forget myself" and "remember kindness".
Remember all these and you'll be an awesome composer ^.^