While I agree that we have a duty to avoid unethical brands whenever possible, there's just no way to escape them all. I live in a poor country and I there's a lot of "bad stuff" I have to buy just because it's what I can affford at the moment.
There is no ethical consumption under capitalism.
This is true... but with some corporations it's just a case of "fuck you in particular."
Fully agreed. While it is morally positive to avoid especially unethical companies, ultimately it's not possible in all cases. As long as you try to be moral in your day to day actions and you on some level push for things to be better, you're not morally culpable for the failings of the current system.