Negativity is dissolved by becoming aware of its source. I personally define negativity as the resistance you have to what is so. Life is just rolling along and there you are, resisting whatever it is doing. The past is simply a figment of your imagination that you are now resisting. The future is an illusion that you are having that you are resisting. People are doing just whatever they are doing, and you are reacting to your opinion of what they are doing. It's not what they are doing that is bothering you, it's your opinion about what they are doing that is bothering you.
In a nutshell: Your opinion is the source of your negativity.
You have been conditioned to think, that this is the right way to do this, or, this is the right way to do that, or, these are the right behaviors. But all of that is just, your parents, or whoever raised you, doing their best to get you ready for life. What you believe about the world is not the truth. What you believe is just conditioning.
Today, just roll with life, and watch your negativity dissolve before your eyes.