Covered in rust and dust; (figurative) inferior; in poor condition; (also) outdated.

figurative. That has lost its freshness and interest; bearing marks of age or neglect; of old-fashioned appearance or behaviour, ‘fogeyish’.

Covered or hung with cobwebs. Also figurative.

Dilapidated, filthy, slatternly, squalid; sordid, depraved, disreputable, worthless.

Of a place or a building: badly cared for, neglected, run down.