Multi-national projects: Which ones would've been better if gone alone?

Sometimes working together with other partners (significant ones who have substantial influence and workshare) creates more problems than good.
In which projects do you think it would’ve been better if partners went at it alone. I.E. Yak and Aermacchi going their separate ways

Eurofighter
NH-90
Tornado
Tiger helicopter
etc

I’ll argue BAe should’ve went ahead with their EAP alone, same for France and the Tiger