William Shakespeare was a great playwright. He wrote his plays in early modern English, which is different enough from modern English to give people problems in reading them. Also it's written in a poetic form so that can also be difficult. It is easier to understand if you listen. And plays are meant to be performed: to be seen and listened to.
One common misconception is that Shakespeares plays are high class. It may be so today. However, in Shakespeare time he wrote for the common man. If you look closely at his plays there are quite a few bawdy jokes. It was in relatively recent times that his plays were elevated in status.