These kinds of people are not worth your time or stress. Every second of your life that you spend with someone who is a negative is not only a second you lose from something you value more, it takes something out of you. It’s not not neutral it is a draining negative. The effect of dealing with them will linger with you and continue to take away from your precious life. It’s like a left hook to the head followed by a right. And for particularly crappy people you might as well take an uppercut to the chin as well. You may suffer the effects for days to come.