Why not poor coffee? Thanks :-)
Poor is bad quality - špatnou kávu, nekvalitní kávu. Slabou kávu is weak coffee - a lot of water in it or a small amount of coffee.
is there a difference between nenávidět and nesnášet? Could either be used?
The meanings are very close, with nenávidět being perhaps stronger (especially, I think, when used about people). But both are accepted for this sentence.
I suppose one could also call it a "long coffee".
Or "acqua sporca" - dirty water - špinavá voda :)