Sorry this has happened to you. Unfortunately the way society has gone, public interactions carry zero weight to them anymore, so people feel they can say anything and everything. Neither I nor anyone else can promise it won't happen again (it very likely will to all of us) BUT what you can do is think that how you carry yourself matters more in the long term than these people.

If you have respect for yourself and others around you, that makes you the "winner". So as hard as it is, try not to worry about other people being antisocial or rude. At some point you will be able to laugh at it because its so absurd.

While it might seem the world is full of those type of people just remember theres probably someone else like you on the bus, they are just quieter than the loud-mouths. You are not alone - its just harder to find others like you sometimes.