Negativity in attitude could mean you develop a negative opinion about yourself. A negative attitude could cause you to withdraw from social contact as you are worried how other people may see you. This can lead to feelings of isolation and loneliness, which can then cause low self-esteem. Low self-esteem can make it hard to try new things or complete tasks. This can stop you from living your life the way you want, and lead to frustration and depression over time.