Hang on a minute, what exactly did the other pilot do that upset you?
The way I read your post, you turned up at an airfield where someone else was already there, flying circuits for their own purposes. Before you arrived, the only aircraft in the vicinity was the one flying downwind circuits.
You then stated to them that you were going to wait until they had completed their flight before you would descend to circuit height.
You then got sick of waiting politely, and went somewhere else.
Did you at any stage ask the other pilot to let you use the reciprocal runway?
Did you possibly consider joining the circuit along with the other aircraft, and making a landing yourself, downwind?
The way I read it, all you said to them was that you were happy to hold for as long as they were still doing circuits, and then you got annoyed that they continued flying circuits.
Trent: We have nothing to suggest they didnt have operational reasons justifying downwind circuits. Perhaps giving a student exposure to downwind landings?
There is also nothing in the original post that suggested anyone was actually using the into-wind runway - merely that he wanted to use it.