Okay, it's 1525. I'm actually completely stuck as to what to do. I tried playing various ways out of this and no matter what I do, I'm stuck
The only solution I see is to kill Izzy now. Her culture is REALLY bugging me and she's running away. However, I'm having A LOT of trouble with that

She gets rifling in a couple of turns as well which is a bummer
I mean the game SHOULD be ''won'' with all that land I have, but I'm struggling to see what to do with it.
Edit: Oh and lesson learnt: Cavalry sucks against Rifles