You're absolutely right, a lot of this is due to the patent and copyright shenanigans of the major industry players. They commit fraud and treason against society in broad daylight. So if there was software "that is acceptable to the six major motion picture distributors", I would reject it on principle. Example: I have never, and will never, buy anything related to BluRay.
As for the tax software, I'm not quite sure what you get from the accounting firms. A list of loopholes? Just some slightly more friendly documentation than from the state? In the various countries that I have filled in taxes, the software I used was free of charge, and distributed by the national tax authority or city counsel. In one instance through a central web service where you would fill in and save the number online, and in another through cross-platform (Java) software, which also included a GNU/Linux installer. If I needed more help, I could certainly pay an accountant, however, even at a very moderate rate, I think I would incur a net loss.
Finally, for video games, I made an exception, and went for a console. That took a long time to reason about: Should I pay any of these companies at all, and if so, which one was the lesser of evil. In the end, I feel the choice between Microsoft and Sony was arbitrary. Neither company deserves a penny from me, and I would happily see both vanish. So maybe I made a mistake.