I've been insulted by random people all my life. I spoke about it (I'm 32) with a friend yesterday and I was on the verge of crying. I don't understand.
People who didn't know me called me "loser". "Hey loser", or "why do you speak to him he is just a f*****g loser" (all of these by very different people). I know only 3 people, my 3 only friends, who don't call me "loser", gratuitously and randomly. I had a nervous breakdown over it, I thought I was socially bullied.
This is something that you might live when you are 12, but when you are 24, 27, 30, something is wrong. You don't randomly insult a grown man in the street.
All my life I tried to find funny/witty comebacks about this and once my closest friend (who is empathic toward my situation as he witnessed it and was "gobsmacked") told me that NO ONE should be insulted the way I am, and there is no "funny comeback" to respond to that, this is something that shouldn't happen, and shouldn't be dealt with lightly.