In short, motorsport is boring me now, not just F1.
My excitement has gradually declined over the years - part of that was me getting older and wiser and part of it being how planted the cars are (and not just F1, but most forms of racing on two or four wheels, I guess partly due to the technology and telemetry available now and partly due to most tracks being really smooth and predictable, so for me most forms of motorsport aren't as exciting as they once were).
I'm not going to stop watching F1 because the regulations are stupid, but I'm not going to ensure I watch every race live either, like I used to go out of my way to do. I didn't bother subscribing to Sky (though had access to Sky Go for some races) and now if a race isn't on the BBC (and now C4) I've just listened to it on 5 Live, and if it sounded exciting I'd download the race in full, or it was boring I'd just watch the highlights at some point. Long gone are the days I'd get up to watch the Australian GP.
FOM annoy me with their neutered version of the V6 engines too, seemingly intentionally stripping them of all character when in person they sound amazing, if not overly loud. Their instance on running a race at prime European o'clock annoys me too, running the risk in certain countries of a race being delayed or cancelled altogether because of their lust for viewing numbers in proven markets.
The BTCC used to be the gimmick sport with gimmicky rules and more recently equalisation of engines (but only engines for some reason, except for the RWD 1st gear), and F1 was, outwardly at least, primarily sport with some sponsorship. Now it's all blended together and F1 if anything is overtaking the BTCC in that regard.
LMS is strong at the moment but still primarily use F1's new Tilkedromes and who's to say there won't be utter domination in the classes within a couple of years?