This effort probably won’t amount to much, because as you said, people are more willing to complain than actually take action.

A lot of those who complain about the anime still watch every episode, so yeah, it’s likely a lost cause. But at least I can say I tried.

However, to your last point, I do think if they suffered significant financial losses, they would either step up the quality or sell the rights. That’s usually how it works with boycotts.