vw737
Just a thought ..... when you don't have all the facts, don't dramatise your thoughts with rubbish (such as 'perceived' low angle of attack and dragging the aircraft off the ground...), rather just ask the pro's for possible explanations. You just might get a better response.
I have been in South America (I am a 747 Captain) and have been given an incorrect fuel (already loaded) for the available runway and had to offload x tonnes of fuel, wait for the temp to drop 10deg C, the wind to shift to the better runway, offload freight and econ pax bags before being able to take off.
We consider many variables in our deliberations including crew hours, which may be limiting additionally), much of which is unknown to the general public.