The issue with boycotting a huge company like Nestlé is that you put in a ton of time and effort while denying yourself lots of useful products and on Nestlé’s end, they lose out on less profit than they bring in in a single minute.
They made $9.7 billion Net income in 2022. That’s over $18,000 EVERY MINUTE. You can’t make a difference and they don’t care. The only ways to enact change are either through the legislative/regulatory route or through the extralegal route.