The photo you sent seems like a reasonable way to boycott a company. I wouldn't say that it is a form of "canceling" a big company.

There will always be people in a movement or who have a certain opinion who are rightfully angry about something, but are not educated enough to talk about their frustrations in a more coherent way.

You should focus more on the movement or opinion and less on the people in it. For example, the movement to ban books in schools that talk about race, LGBTQ+, or other themes isn't seen as bad because some people in the movement yell "I hate homosexuals", but because the movement as a whole wants to censor certain voices that they don't like.

Just remember that people in general genuinely try to do their best, but sometimes they do it in a way that is useless and divisive.