Why do the "animals", in the book Animal Farm, want to rebel?

Well, in the book Animal Farm, the animals want to rebel against the farmer because they feel that they are being mistreated and that they would have a better life with out the farmer. In fact, they think that if there were no humans in the world, they would have a much better life. Like the animals on the farm, kids and or adults think the same way towards one another. Such as when the child feels like the parents don't ever care about them and just care about themselves so they feel left out or when the parent or adult think the child has no respect for them as a person. Most people feel that way at one time or another. But they must think of the possible outcomes. There could be good or bad outcomes. There are many possibilities in that situation though. Many just state that they are right and others are wrong so they should just trust their word on that when it isn't even truthful.