Pretty much the same as one of the members above, i had a dxb-doh-bkk flight, the dxb doh was late and i ended up waiting 6hours there.
I have seen in Dubai someone dressed as a pilot coming in at 19.30 when the flight was supposed to leave. Qatar told us it was a security check that was delaying the plane but the pilot said a technical issue. I'm pretty sure it was Qatars fault but how to prove it? and anyways as usual they wash their hands off saying it's not their fault.
I like Qatar airways but a 5 star airline has to have a 5 star customer service which they clearly don't.
Needless to say that i had to argue for some time at DOH to be allowed to use a phone to let the hotel know in Bangkok about my delay.
I wrote them an email and obviously they don't care about their passengers nor their gold members ( has no real value to them). I got a standard we're sorry it's not our fault.