What might also be brought into account from the other side are all the British troops wasted in places like Walcheren, Buenos Aires, the West Indies, and North America. Additionally, Austria lost four separate armies in northern Italy in 1796-1797 and were working on their fifth when they threw in the towel. Prussia wasted their entire army as dead, wounded, and prisoners in 1806, starting a war they really couldn't win. How many Russians were wasted by Alexander during the period against the French, Turks, and Finns? He certainly didn't stay with his, though he tried to play soldier more than once. At least Frederick William wasn't a coward, winning respect under fire at Auerstadt.
What should also be taken into account for Egypt is that when Napoleon departed, the army was in no danger of being defeated or overwhelmed. As a matter of fact, they lasted quite a long time and most were repatriated home, were they not?
What about Desaix and Davout? They came home early...