We all go through rough patches. But for whatever reason, the journey through life is much tougher for some people than others. If you’ve had to travel over a lot of rocky ground, you’ve probably found that the people who’ve tried to give you a hard time along the way never had to endure the same kind of difficulties you did. So since they didn’t have to fight those tough battles, they have plenty of excess energy to spend trying to make themselves feel important at your expense.