What traits make Virgo and Gemini likely to use manipulation compared to other zodiac signs?

Why do people sometimes show disappointment in gifts they receive, and how can you prevent this reaction?
I told my family member that a relative was bluntly dismissive of me. The response I got was "she is not such a person". Followed by rationalization saying it was a misunderstanding. Why am I being ostracized in this way?
What are some of the most ungrateful reactions you've experienced or witnessed when someone received a gift?
What has happened to common sense in public debate, and why are so many people now afraid to say what they actually think?