So by your logic then...
...just because YOU can't get reception, the whole network is crap?
I could say the same about Vodaphone, I can't get any reception where I live, so the entire network is crap.
Erm... no, there's bound to be areas where you get patchy reception. Not to mention it's not always the network, it could be the hardware. I used to be on Virgin Mobile with a Samsung phone, couldn't get any reception in my house whereas my wife on the same network with a different model Samsung phone got full reception.
At the end of the day it happens, doesn't mean it's a crap network, just might be a case of some networks having better coverage in some areas than others. We'd probably have much better coverage in our area if the bloody campaigners round here didn't campaign against a mobile phone mast (chances are they'd be the first to complain about the lack of reception!).
Back on topic, I think Ofcom should make the information available, but hey since when have Ofcom actually thought of the consumer. They're nearly as bad as Oftel before them.