Today when people speak of Puritanism, they often use it in a pejorative way meaning a harsh religious system. However, the Puritans have a rich heritage that has and continues to bless the Christian church.
While there may have been some abuses within Puritanism, the same can be said about every religious movement. It is always better to learn more about a movement than it is to criticize without knowledge.
You may find this documentary on Puritanism by Ryan Reeves to be a helpful overview.