How can you stop cattle ranching?

You can't. Ranching has been around for a lot longer than you have and is a HUGE industry, something far bigger than what one person can control or stop, so it's something you'll just have to live with.

If I were you, I would try to find some balance instead of giving the ultimatum of choosing whether to having a certain industry and not having it. If you want to be a part of the "movement" to "stop" ranching, then don't eat beef, period.