How is puck an antagonist?

Puck is a very important character in the play. He is more likely to be a protagonist than an antagonist. The puck does cause everything to mess up and create the humor. However, the play also focuses on the lovers, Titania, and Oberon. It's hard to decide. What is your opinion? But my opinion would certainly be: The puck is a protagonist.

But all I could give you of any possibility for the puck to be an antagonist... Well, you could say the lovers are also one of the main characters and one of the mainly focused ones! :]