Pet hates on TV? Hmmm.
A vast amount of the adverts annoy me. The rest are usually better than the programmes they interrupt.
Sound compression in adverts, making them twice as loud as your comfortable listening volume. Unfortunately, they still fall within legal sound-level requirements, so no change expected any time soon.
the dusting-off of archived material in lieu of any fresh talent.
That annoying picture-in-picture announcer that pops up when you're trying to read the credits, shrinking them to a size only readable by microscope.