"used car tyres, plastic bottles, Styrofoam cups / rightly tossed back by the oceans mood swings"
mp - speaker talks about rubbish on seashore
asyndetic list - no end to amount of rubbish / too late to fix / becomes overwhelming for speaker to see home like this
personification - "tossed" - disgust, unworthy / beautiful thing shouldn't be treated like this
noun phrase "mood swings" - unpredictable / emotional / ocean did this to protect