The first clause gives the cause or the approach and 때리다 is striking: getting angry and hitting, coming over specially to hit someone, never getting the chance to hit back. But watch the slangy compounds in these lines, where 때려 넣다 and 때려 붓다 mean chucking things in or pouring them in with force and have nothing to do with violence, as when the mushrooms and leftovers just get slammed into the pan.