Yeah I'm still on hard and finding it not too bad. I did the first clicker section in less attempts than on PS3 but it still took a while. I eventually worked out a flawless pattern to taking every enemy out.
It was very satisfying in the end, more so than the first time I played. It's hard because you have to kill them all, otherwise moving that object blocking the door alerts them, whereas in other parts of the game a lot of the time it really is as simple as just very slowly moving around with the occasional distracting bottle or brick, at least where infected enemies are concerned.