Look at the stages on gronze.
Day 1 has a 3km steep incline at the 10km mark.
Negreira to olveiroa has a steady incline.
And closer to Finisterre has a decline some might find difficult.
For someone starting from sdc for the first time, esp carrying their own luggage, or doing the gronze "stages", they might find it tough.
I misremembered the difficulty when I recommended it to a workmate and his wife in their late 50s. I said it was relatively flat and could be done in a long weekend.
Which is relatively true. Certainly less challenge than the initial stages of the frances from st jean pdp.