The terms would make something like F-Droid impossible. The fundamental problem is that Apple believes it is owed a fee when people distribute apps for the iPhone, but no legal mechanism entitles them to such a fee; I'm fairly sure it's possible to make an iPhone app without copying any of Apple's copyrighted code or using any of their patents.
The only mechanism that allows them to collect one is their technical control over the platform, and that's what the DMA was intended to remove.