This one coming in from someone who knows sod all about flying other than sitting in one far too often.
It appears that the crew messed up at take off. Not that bad though as the aircraft got airborne and remained airborne until the Capt decided it shouldn't be.
Capt made his decision of where to land and what procedures he should follow.
He landed the aircraft on the runway (better than his take off), all PAX and crew got off safely.
Other than the take off he did it all OK in my books. Some of it may have been luck but I am sure there was plenty of skill and sound judgement that went into it together with his training.
You criticise EK training but perhaps this Capt had plenty of experience on type before going to EK?
The investigation will find out all the details, but until then the Capt has to live with the fact that he fecked up the take off and thank his lucky stars that he got everyone safely back on the ground.