Do you mean the alphabetic letters with various accents? Or do you mean the IPA symbols? Which ones are hard to type?
père
fête
etc.
For me, I must type the first letter, then hold down the Alt key and type the corresponding numerals from the number pad, then when I let up the Alt key the accented letter appears. It won't work if I use the numbers from the upper row on the keyboard, but that may just be my keyboard.
On the chart from Wikipedia, both of my examples above were listed, but those were only examples for their respective pronunciation symbols.