Is it permissible to say to the television, "Stop," as a joke when it makes an annoying sound, and is this considered major shirk because only Allah is capable of such a command? And what is the ruling on describing a bad religious website as "trash"?

The questioner's first statement does not contain major or minor shirk, nor is it a form of seeking aid; rather, it is a common expression people are accustomed to, and no intention of making inanimate objects hear is implied. As for her second question, it does not contain cursing or mockery of religion; rather, the blame is directed towards poor services.