Hmph...
I've dealt the same hand and there is no deductive logic to this. It should not be the burden of the individual to walk around with pixy dust and a happy face, because if someone's not going to like you they aren't going to like you. Sometimes being nice adds fuel to the fire and they feel angrier. For me, people have to get to know me over time. They rarely like me from straight away then if they get to know me, they want to be my best mate. Dunno. I'm the same all the time, I just don't care what they think anymore. It was too heavy, hurtful, damaging and a waste of time. I lost a good job because no one was going to remove me from a hostile work environment and leeches feed from knowing your miserable. Find ways to focus the disappointment of their projection and remember that you were promoted by your employer, and you are there to do a job. Let that be your reason for suiting up and showing up, if you give that other ish your energy, you will have an ulcer in a month. Take care and remember, you can't control others, you can only be true to yourself.