Then they should build their own semi plant. If TSMC is unreasonable they should switch vendors or build their own, but complaining about it isn't getting them any sympathy.
Getting off a foundry is probably no easy task. And the fact that TSMC is taking on Apple in what would clearly be a new highest-priority customer, I think NVIDIA is going to continue to struggle with this aspect of their business.
It's not that TSMC is a poor company per se, it's just that they're way, way overcapacity and things like die shrinks and new architectures are going to have to move at their pace.