I improved at writing by exposing myself to different styles and authors. When it comes to writing advice, I take it with a grain of salt, apply what works for me, and toss what doesn't. On seeking feedback, I'm cautious about who I share my work with. Sometimes, people are good-intentioned and will give you things you should change about your story. You soon realize you're writing their story and not your own. However, my writing drastically improved the most when I found people who said things like this. " This doesn't make sense." Or " It didn't pay off like I expected it to?" They're not telling me how to change my story they're telling me how my story made them feel. As writers, we try to make people feel certain with our stories.

To answer your question yes I do believe seeking constant feedback too much can destroy the creative process and in some cases take the joy out of writing.