You could say 'my hometown is not very modern' or 'my hometown has resisted modernisation'. It would be normal to follow up this kind of remark with reasons why you think this to be true. E.g. 'It is very quiet because...', ' The nearest city is xxkm away so we don't have...', 'all the buildings are old', 'the people who live here/there are...', etc.

Good morning, Sophie! I agree with Angus: saying that your hometown isn't thriving would be the smoothest and most correct in this instance. If you're talking about your town being innovative (with new companies, new ideas, new research - like Silicon Valley, Google, and the like - or with regard to cutting edge ethics/morality/philosophy), you'd say "My hometown is not very progressive." "Progressing" is generally used to connote how much progress is being made in a project or activity toward its goal.

It would be correct to say "My hometown is not very progressive." or you could describe your hometown by saying: "My hometown is not as developed as a city."

I am living in a developing country rather than a developed country.

u can say my hometown is not very prosperous/ thriving/ flourishing/booming. that will be great :)