I was just wondering what versailles was like after the royal family left? Was it boarded up and left to fall into despair?

It was completely abandoned after Oct. 6, 1789 ... Louis-Philippe has made a museum in the 19th century

and is still undergoing restoration!
to make it as beautiful as it used to be!

This may not have been the case. Tony Spawforth’s “Versailles” has a whole chapter of what took place regarding Versailles after the Royal family was taken to Paris. It says that the Royal Offices were kept “in readiness for a brightening of the political skies.”
Tapestries, mirrors and paintings were still in place but furnishings from the state rooms had been removed. In August of 1792 authorities “placed seals on the palace to prevent any unauthorized entry and to protect it’s remaining contents.” 1793 - the republican government decided to maintain, at state expense, all the old royal palaces. They sold the Grand Canal and it became pastures, the Petite Trianon, a lemonade maker turned into an inn. In August of 1793, a series of sales began - in which everything from furniture to curtains and candelabra were sold at bargain prices. In 1837 it was opened as a museum.

There is a lot more information in the chapter - most of what is written here is heavily paraphrased or quoted from the book.

It's interesting to compare this with Beijing's Forbidden City, where a similar series of events occurred: revolutionaries trashing the place, subsequent governments trying to restore the glory.