Having spent 35 years in politics, I believe that it is easiest to avoid by reminding oneself that there are multitudes of political camp followers with their own sense of identity coming from their minimal involvement. To them, they are the leaders of their own movements even though they merely "attend" the events, rallies and protests instead of doing the groundwork to accomplish change. In other words, it is like the fans of certain movies who convince themselves that they created the movies they enjoy, not a bunch of bankers who expect coldly to be paid a lot of cash.
Secondly, it is good to realize that politics usually causes failure. It isn't a kind mistress. People will lose their battles frequently. The one human emotion that can't be sustained is anger. So, if an individual's driving force is anger about their opponents, it is a mathematical certainty that they will burn out quickly.
Finally, understand that politics worldwide has been turned into a comical version of professional sports. The financiers of politics like it this way because they can "brand" their ideas in ways (logos, colors, flags, T-shirts and symbols) that followers will accept. Too much of politics is marketing. All the people in the world will lose their campaigns if they don't stoop to marketing their ideas.
So, the political lifespan your average campaign follower is short and riddled with disappointment. When one sees this in action, it becomes very easy to walk away from the carnival and never look back.
If political followers want to have real power, they should learn to lobby elected officials of all parties, not campaign for them.