Dealing with difficult people

Everyone have a choice to make, whether the outcome is a favourable one or a disaster will all voice down to what choice did we choose.
Personally, for the past weeks, I encounted a number of people I feel hard to deal with. And I believe it is really hard. I even came to a point not helping the person and just hope one day he or she met someone who using a method that can deal with them. I should say, I had given up on them.
In a working environment, someone was tasked with roles and responsibilities. Just that he or she did not do their part and you was being arrow to work on it. Was that fair? I don't mind helping but it got worst. You basically can just replace what ever job he or she is doing. And whenever needs help, you will be always the one get involved. Playing tai-ji is whati had learnt from him. And finding easy way out will always cause other feel that you are irresponsible.
Another one was more on commenting others while he or she did not look into mirror.
And what serious is that he or she was not tactful and direct which cause others to feel emotionally and psychologically affected. And one of my friend just summaries it as low in EQ!
A friend of my was being outcasted for very long. I just feel bad or uncomfortable for not telling but I think is good. Anyway, he or she is just very pity and bear hatred.