They're doing a piss-poor job and I question their commitment too, but not because they've canned a rubbish game.
Sure but it's not just another game out of a dozen or something, otherwise I'd agree with you. This was literally one of their projects that they claimed was a sign of their commitment to PC gaming (dubious or not). So saying "so much for their commitment to the PC" isn't exactly unreasonable considering they have next to no actual PC projects and just finished killing this one after a short period of time.
When they announce something in its place or show case some other projects then I'll reconsider. I'm not counting that "exclusive" Metro game that looked like it was made for kids though