simple and crude

entrenched bad habits, outdated customs, or corrupt practices

ignorant and inexperienced; lacking in broad knowledge and wide perspective

To use crude but simple methods to adapt to poor conditions; to do things simply and thriftily.

poorly made or lacking refinement in craftsmanship or appearance

shallow and crude; lacking depth, breadth, or refinement, typically referring to knowledge, views, or abilities

outmoded conventions and undesirable habits

having limited knowledge and experience; ill-informed

undesirable customs

objectionable practices

limited in knowledge, experience, or understanding; shallow in outlook

shabby, poorly made, or simple in environment or quality

having limited knowledge or narrow experience; ill-informed

The Burrow (Harry Potter)

humble dwelling

sordid and contemptible; vile and repulsive (especially of character or actions)