Mostly, he didn’t like the way Becky kept making comparisons between him and Ian, and this was something that was getting on his nerves to quite the large extent after some time.
Some fans had apparently noticed that as well, as there were certain discussion in that direction in various online messaging boards related to the show. People generally saw the situation between Steve and Becky as something that was ready to crack at any minute, and yet some were confused about the way Steve acted towards Becky on the show.
After all though, that’s exactly what it is – a show, and people playing in it are supposed to act to a good extent in order to give their fans something worth watching.
That’s why sometimes those relationships between characters get blown out of proportion, and what looks like a more serious scandal on the screen actually turns out to be a minor disagreement outside of the show. It’s not a rare occurrence and it’s something that people who’ve been following the show for a longer time are well aware of, but those who’ve recently started to enjoy “Big Brother” probably aren’t that well aware of the concept.