There are a lot of things to get you down. Many people do not have your best interests, and will pounce on your mistakes or get jealous over your success.
Some of us will want to run, or hide. Others will want to give up on whatever they have worked on to date to avoid the craziness. Some amongst us will give into the pressure, putting our project, or our beliefs and goals, in jeopardy.
So instead, of rushing for the quit button in some form, take a rest. Or step aside - but only as a means to gain strength to carry on.