Bad ways to end my chinese year

I really should go think what have i done wrong. Colleauges backstabbing me and disliking me. What can be more worse than this. I really can't imagine. But what i can do from now on is to tone down and not to talk so loudly. Cos i feel that those who don't know me feel that i very arrogant and don't give a damm to what think of me. If this is the case, i should take care of my behaviour. WHY everytime like that? When things happen then i start to reflect. Is it too late?