This feels like the correct take to me. I still view the occasional Reddit post but only as an absolute last resort for information I can't find anywhere else. Even though I don't post, comment, or vote, I'm still aware that my mere presence there is helping them in some form.

It's similar to the recent Harry Potter game. Lots of people decided that it's far enough removed from Rowling to be okay to buy even if they were pro-trans. But everyone who bought it DID give some of their money to Rowling. It's your decision to weigh the cost/benefit of such a thing, but it was a little shocking to see how many supposedly pro-trans people straight up deluded themselves into thinking they weren't directly supporting Rowling and her anti-trans views.

So yeah, use Reddit still if you must; I certainly understand how much important/useful content and information lives exclusively there, and the overzealous Reddit boycotters may be missing this (or just don't care). But don't pretend like using it isn't also supporting them.