Need help with lawn

Our lawn looked great this year (San Augustine) until sometime during Sept.  My husband wa a FANATICAL waterer!  The lawn started dying in spots to the point that most of the yard died before winter.  We "feeded and seeded" but haven't seen any signs of life yet.  Since we have had a mild winter I had hoped it would come back.

What now?

One of the downsides of lots of watering is washing away the humus and nutrients.  Another is that if you train your grass to get watered every day and then miss a day, it can be very sad.