" What you would do? "

With what?

Bookshelves and curtains

OK, show more than the makeshift night stand. Describe what your looking for and want in a bookshelf. What type of curtain? Are you using just curtains or a blind as it is apparently a bedroom?

The shelf unit appears large enough to handle the job being that there's avaialble space for more items, so I'd leave it as-is. The curtains part isn't clear, unless it's what's hanging behind the bed, which isn't a clear/full view so I can't say about that. :-)

I would replace them.