I don't fully understand but you could relate it to the fact that even though the sky is bright and colourful, the closer object is torn and broken, hence the dripping of the rain which could symbolise tears, this could show that whilst the overall picture may be cheerful or positive, that doesn't mean that your emotions will reflect that, sometimes we ignore what's right in front of our eyes, it could also show that no matter what happens we will still experience sadness despite how much good we are surrounded by, hope this helps
In the first two sentences, Sinclair implies that the meat industry is very corrupt. He is preparing to reader for his accusations against the industry
