The experiences of someone who failed the selection is probably not the strongest foundation for drawing the conclusion that QR have missed the opportunity to "finally hire some professional pilots". The pilot corps here is as professional as anywhere I've seen. In fact the two best instructors I've ever had were here in QR on the A320. But of course there are the odd exceptions, as in every airline.
Join us and draw your own conclusions, but take others views with a pinch of salt, especially if there is an element of bitterness at a missed opportunity.
Good luck to your friend.