It is your apartment. While you can’t keep tiny ants out, anything bigger can be sealed/screened out. You have to take the time to find every little orifice and fill it.

If you have no window screens, no weather seals, and no concept of building standards, you have your work cut out for you.

But you can purge roaches and keep them out, if you so desire, even if your neighbors consider them part of the stir-fry on the stovetop.