>I managed to stay there for a month before I had to stop because of uni.

Wow a whole month (at one of your first jobs too) OMG yay you!

You sound like a jerk, you work at a rest home for a month and you think you are a goddamn saint do you? You have no right whatsoever to speak about irresponsibility based on this experience because working for one measly month at a 'tough job' and thinking you are somehow in a morally superior position, that is no virtue. A month or a day are both the blink of an eye in terms of employment, you are better off not even mentioning this. If you are going to attempt to preach to this guy at least use a job that you lasted more than a month at as an example.

Granted the most basic message, that OP should try to persevere is fine, it's everything else that makes me want to be sick all over the floor.