I was in a relationship like this for about 8 months. It was horrible.

The way he's treating you sounds like gaslighting. Basically a way of making someone doubt the validity of their own position and undermining them often by making out things that happened didn't or reframing them to make the other person seem unreasonable or crazy.

Firstly, are you absolutely sure that the text was sent automatically? It seems strange that an automated text wouldn't be labelled as such - like the texts that say "you have a missed call from..."

The awkward thing is, I bet if you raised the issue of the text again, he'd get angry and say you were making a big deal out of it - don't go on about it etc. That's not a good basis for a relationship so you need to stand up to him and make him understand why you don't like being treated in this way and that when something is bothering you, you have aright to be listened to.

It's perfectly understandable that the text would have caused confusion. Your reaction was normal in the circumstances, it's his anger which is excessive so just keep that in mind and don't let him make you believe otherwise.