It wasn't OK for that boss to be dissing you. I'm glad you're out of that situation, but it shouldn't have happened.
If no one spoke up for you in the moment, I hope they came to you afterwards with support, and/or spoke with the boss, other managers, or HR on your behalf.
I suspect it wasn't so much a country-towards-city thing, though, but an individual being jerky. You'll find plenty of country people who are neighborly and welcoming, follow the best of Christian charity teachings, etc. Jerky non-inclusiveness in companies also often happens city-towards-country, one-ethnicity/caste-towards-another, one-gender-towards-another, rich-kid-careerist-towards-traditional-nerd, one-school-alumni-towards-others, etc.
If no one spoke up for you in the moment, I hope they came to you afterwards with support, and/or spoke with the boss, other managers, or HR on your behalf.
I suspect it wasn't so much a country-towards-city thing, though, but an individual being jerky. You'll find plenty of country people who are neighborly and welcoming, follow the best of Christian charity teachings, etc. Jerky non-inclusiveness in companies also often happens city-towards-country, one-ethnicity/caste-towards-another, one-gender-towards-another, rich-kid-careerist-towards-traditional-nerd, one-school-alumni-towards-others, etc.