Is it even possible to boycott Sony? Or are they like some other entities: tentacles wrapped around so many things that we can’t avoid them?
  • Sony pictures is one of the “big 5” Hollywood studios (11% market share)
  • Sony music group the second largest music company in the world (22% market share)

Its usually easy to avoid using their hardware directly but you they have a pretty big slice of media.

U.S. & Canada: market share of film studios 2023 | Statista

In 2023, Disney alone accounted for over one-quarter (20.3 percent) of the box office revenue in the United States and Canada, thanks to blockbusters such as "Oppenheimer".

Statista
I dropped crunchyroll as soon as Sony bought them and i have watched and listened to plenty of Sony content with out giving them anything. Been that way since early 2000s.
There’s the problem. It’s fairly easy for me to avoid those slices since I don’t care for their movies or any of their artists. But some of their tech has become de facto standard, so that’s harder.
Just do your best.
That’s all anyone can do, really