Social media is hardly regulated, except in some advanced countries. And despite this, there is no limit to what people can say about brands, because that's their opinions on the said brands. This has given competitors to be hiring some online users trolls to be calling out brands negatively, especially if they seem such brands as threat.
Other reasons may be to get attention to themselves. In most cases, small brands are given more attention if it has issue with the bigger one.
Other reasons may be to get attention to themselves. In most cases, small brands are given more attention if it has issue with the bigger one.