Noob Question, re: revolts

Last night I was playing as the King of Scotland, I had amassed quite a nice empire, extending myself down through the top of Ireland.

There was only one faction that existed, he had around 15% support or 1200 troops. All of a sudden he decides to revolt, and then I receive a bunch of notifications that everyone else is revolting as well. Pretty soon my troops were extremely overwhelmed and the game was over.

How can I prevent this from happening again in the future? I read about destroying titles, is that what I should do?

TYIA. This is my third game, first game outside of Ireland.