Can't link to any actual figures, but for any channel aren't viewing figures down drastically from what they were years ago when three/four channels were available/ Ie a Saturday night show might top, what, 5m when 30 years ago it would have been twice that? Of course the same audience is spread around a multitude of channels, we can watch on catch-up etc; but I would have thought that the main reason was as alluded to above....it's just dross, padding, constant ads on commercial channels and more dross, fluff, filler and dross.
Apart from sport, I can't recall a time when I looked at a TV listings and said "oh, I must watch that" and I don't take a paper now or search out listings on the web, I've given up. I'll dip in to 24 hrs news and the Daily Politics show, but that's just about it.
One thing irritates me above and beyond, and that's when sport on a pay-channel contains ads. The subscriptions for both BT and Sky are enormous, IMO they could easily drop the ads and trailers and let the sport flow. To me, ads = free TV, a sub = commercial free TV. So, yes, I'd pay slightly more for an ad-free sports service (as I would for commentry-free options!!).