Probably that ethipian driver arrived in doha in your same flight.
You blame the driver. If you buy a car you will blame the mechanic, you will blame the indian in the grousery, you will blame the stupid qatari putting his white land cruiser in your face, you will blame... even leaving the country the qatarairways waitress becouse the food.
Take it easy man...
I dont see people bleaming Haumn Rhitgs... its very easy blame a poor guy.