Really Heathrow Harry if you think LHR is bad, you need to get out and do a bit more flying.
Admittedly LHR was a poor poor place not all that many years ago but it has consistently improved recently. The new T2 will continue that trend.
Not saying that it's great but there are much much worse places in Europe never mind the world.
It's just fashionable to knock it amongst the middle class chattering dinner party types. But boring really.