What are the videos of people inside of it?
You saw Gravity, right? How about Apollo 13? If they can fake all of that, they sure as hell can fake the "inside" of the ISS, which usually involves a couple of people floating through and around aesthetically chaotic metal tubes.
But the thing is, those cuts are much shorter, in smaller areas, and with less quality/detail. What about it do you reject? If you believe in satellites, then what about a man? Why not a space station? Why not land on the moon? It all works on the same principles, just with heavier payloads and bigger rockets. Putting a man in space is nothing more than having to lift the weight of him, the equipment required to keep him alive, and a way to get back down safely. And if you say you can't keep a man alive in space, think about deep-sea diving spheres and such. It works in much the same way, just holding the air in rather than water out. It's really nothing monumental to get a man into space, mathematically it's just a heavier payload, and scaled up all the way to the International Space Station, a lot of REALLY heavy payloads. If you say they couldn't get the ISS up there, it was shipped in small parts, all put into the exact same orbit, so that they would intersect, and then they were connected, basically.