Don't be put off by one critique by one person. Critiques here can be harsh at times, but are often warranted and just as often disregarded when there is good reason to. If someone feels there is room for improvement, they'll say so, usually with tact and helpful suggestions, but sometimes without.
That being said, there is a User a Critique section where critique is expected. In this Landscape & Nature Photography thread, I often find that the critique is a little more reserved unless a poster specifically asks for it.
Keep posting - you'll be amazed at what you can learn here. And besides, the hard lumps are not physical and not personal.