Yeah, you're wrong and not nearly imaginative enough. Imagine a fascist group secured monopoly rights on TV streaming. It would be morally justified to steal it. Disney is just a lessor version of that.
But like stealing from people just because you don't like them doesn't really change the moral calculus. I'd imagine most people that steal anything don't like the victim very much. Do what you want (or what you can get away with) but the "moral" thing would be abstain from consuming the products entirely or buy them according the terms of the seller.
Probably better to just... not watch their content, in that case?
Nope, still better to consume their resources without paying