Any reason why your parents want/prefer you to stay where you are at?

IMO what you're experiencing now is just a fraction of what you're about to face after you graduate & start working. When money, bonus, promotion, career & future is at stake, you'll see how nasty people could be when competing for it. When they can't out-do the competition, they'll pull their competitor down below their level. So, instead of running away all the time, the better & long term solution would be to learn how to manage this instead. You can step back, catch your breath & then go in & bite the bullet. Just don't keep running away from it all the time, a victim will remain a victim unless s/he step up to stand their ground & fend off their predators.

For your bullying case, be brave & stand up against those bullies. Playing a goodie two shoes peacemaker just sucking up punches, hoping they'll get tired 1 day is just gonna encourage more punches from your bullies in the future. You can avoid them, but if they put up a good effort to look for you & bully you, then there's no escaping that. They need to know that you're no easy prey & that they need to stop bullying you.

For the unhygienic food, take videos or photos if possible & report it to the local town council or Ministry of Health. Like the Raj Banana Leaf case, if you're right, people will support you & actions will be taken against the wrong doers. If you're merely exaggerating, then hardly anyone will support you.

For everything, there's a proper place & channel to report it. Just need to be clear whether whatever you're reporting is justified or merely exaggeration.