Yes Nestle` have a lot of tentacles. They own 30% of Loreal.
I think it depends how you shop how difficult it is to avoid. I know lots of people who refuse to purchase Nestle`. Whilst you are right that one person won't make a dint - collectively we can. Not only that it's the Energy behind it.

When folk collectively come together to stand for a cause it creates positive Energy.

Having a Nestle free Easter requires a conscious choice on the part of the consumer. It's about thinking before you put your dollars toward what many (myself included) see as a very unethical company.