Racsoviale
Smoke me a kipper!
It also takes some time to cool down. In the menu where you can check your forcelimits you can see how much War Exhaustion(WE) you have. If for example you have just finished a long war and your WE was very high and you then get dragged into another war it wont get down and you might even get even more WE.
And being a big empire brings alot of problems which WE makes worse. I would imagine you might have some provinces that are not in your culture or accepted. BAM! extra revolt risk, you have some provinces that are of another religion, BAM! again, other nations have cores on some of your provinces AGAIN!, you have passed your governments limit for centralisation/aristocracy. BAM! you cant afford to build courthouses everywhere means more provinces with high revolt risk.
All of these things influence which provinces that are going to be most likely to revolt, and being big means having a lot of provinces. building courthouses and taking cultural decisions which lowers national revolt risk is in my experience a good way to deal with WE, since the overall amount of revolts gets lowered and you end up not noticing if your WE is starting to climb a bit.
And being a big empire brings alot of problems which WE makes worse. I would imagine you might have some provinces that are not in your culture or accepted. BAM! extra revolt risk, you have some provinces that are of another religion, BAM! again, other nations have cores on some of your provinces AGAIN!, you have passed your governments limit for centralisation/aristocracy. BAM! you cant afford to build courthouses everywhere means more provinces with high revolt risk.
All of these things influence which provinces that are going to be most likely to revolt, and being big means having a lot of provinces. building courthouses and taking cultural decisions which lowers national revolt risk is in my experience a good way to deal with WE, since the overall amount of revolts gets lowered and you end up not noticing if your WE is starting to climb a bit.