The problem is that Apple takes the already existing technology, makes it better, and then goes and sues the company that originally developed it. Or worse, Apple will pretend that it was the one that invented the stuff, and will sue anyone who makes anything remotely similar.
Because it's not about Apple suing people who copy IOS. No, it's that Apple sues companies that make rectangular tablets with rounded edges. Or suing companies that make laptops shaped as a wedge - a design that laptops used ever since they were invented.
In other words, Apple used to create new ideas by combining existing technology together, but is now busy with one large anti-free market lawyer war. For a company that is known to be innovative, Apple is now doing anything it can to stop innovation, because after all, as anyone who took even a one-hour course in economics (or evolution) know that competition spurs innovation.