Every writer who puts their work out there will have to face critiques of all flavors: the good, the bad, and the outright mean. For the new writer, one just starting down the journey, sending that baby out for review can actually be a terrifying experience. "What if they don't like it? What if I'm doing it all wrong? What if they tell me my writing is shit?"
Well... Not everyone is going to like what you write. Writing is like art — filled with subjective opinions. If you're determined to have everyone in the world like your writing, then you might as well give up now. It's never going to happen. The best you can ever hope for is that the fans of books you like to read, the stories that influenced your writing, also like your book.
In terms of doing it wrong... I'm sorry, but this is your writing. You are the only one who can judge if you are doing it wrong or not. What others can do is tell you why something didn't work for them, potentially providing suggestions to make your writing stronger. Whether you take on board those suggestions is entirely up to you.