Parliament is our constitutional democracy, elected by the People. The Executive - which used to be the Crown and is now the Government - is separate from that.
So, this is the complexity we now have: the Referendum Act passed by Parliament made it advisory only, i.e. not legally binding. The Executive, with no Parliamentary authority, decided to make the result binding and stated so on the ballot paper. That has created a divide where the legally passed Act has been modified by Government without the consent of Parliament, and it's the same divide as caused the Civil War, i.e. who has power, Parliament or the Executive?
You can insult Parliament all you like, but they are your democratic representatives, not Theresa May, Boris Johnson, and Jacob Ree-Smogg acting from their own interests.