Looks to me like you started playing the game the same way I did. Very aggressive early on. That's probably not the greatest idea. Take it a bit slower, you have 400 years to form your uber empire.
Try to get proper casus belli against countries you want to attack. Holy War really works nicely on muslim states in your case, but for some of the nations around you, consider the Royal Marriage->claim throne->personal union route. It gives much less infamy and thus revolts.
Also, if I attack nation X with a good casus belli to take land from them, and nation Y jumps into the war as an ally of X, and I would like to take them too, I often vassalise nation Y. That only costs 4 infamy, which is the same price as taking 1 province from them. Then, after 10 years and if you bribe relations high enough, you can annex them peacefully for only 1 infamy a province.
It's all about infamy management.
And don't rush it, taking this much land in 30 years, imo, is a bit too agressive.