end up VS. come to VS. come down to

Question

1. How did it end up like this?
2. How did it come to this?
3. How did it come down to this?

I couldn't find any differences between those. Can anyone be nice and help me please?

Answer 1

Let's assume you hate apples. One day you were famished and had nothing else but apples to eat, so you ate one. Someone noticing the eaten apple core might ask you,

How did it end up like this? - Asking particularly about what happened to the apple.

How did it come to this? - Inquiring what situation forced you to eat an apple you hate so much

And between 2 and 3, i don't see any differences.