Panjabijutt, I enjoyed your post but I don't really understand your complaint.
The gate was hot and cramped at Heathrow
You had great onboard service LHR-DOH ^
You then discovered that DOH is one of the best airports in the world at making tight connections happen. They pulled you from the queue and made it happen ^. I assume you were heading to DXB, in which case a missed connection would not usually be fatal.
You got modern equipment (A321) for a short haul connection ^
There was no cabin service because of turbulence - rightly so ^
Some pax coughed on the plane
Plenty of stories for you to dine out on, but all in all it seems to me that QR delivered on a great ticket price.