Project with an international "giant"

I have been in my current project for close to 11 months already by now.
Go by our typical project lifecycle of 5-6 months, this project is considered "extremely" long. To be frank, I am very demoralized by the fact that it has been prolonged from March to Apr and then to May.
Well, there are things not within my control, more so for this project. It is part of a huge integrated project with so much of dependencies. My Company plays the role as provider for the portal solution as part of a bigger program managed by a big system integrator. Things did not go the way I would like it to be, particularly there were so much of slippage in other deliverables that had caused the project target to move from one date further to another.
It has not been a good project for me. Not a successfully one by my definition. Stakeholder management, for instance has been way weak with no clear ownership of deliverables. At times, no culprit could be identified for any delays let alone the accountability part of it.
This is a difficult project and difficult experience for me. But come to think about it, if it is not because of this project, how on earth will i realize that the rest of my previous projects were so manageable and successful?
It is a precious lesson.