I have been using BA and QR over the last year. In fact I have just gone down to silver on EK due to less travel but should go back to gold in a month.
Every airline has problems and If exclusively flying between the middle East and the UK both BA and QR are fine . However EK has the upper hand in terms of connections to the subcontinent from the UK.
I'm stuck with LGW (which I love ) or MAN ( I try to avoid due to the airport. Northerners are very nice people m3red ,DYKWIA please note

but I suspect the airport is staffed exclusively by people with special needs). Since I have to fly in to either of these airports before onward travel . LHR is not an option as I can't fly there directly .
I did try BA a few times from LHR to DEL. Its good as its direct but the cabin interior is very drab compared to EK . I have come to the conclusion that I do like a bit of bling after all.
Looks like my Love hate relationship with EK is going to continue .