I guess I've used a bit more electricity during the last year because I worked from home more, but I doubt it's a factor 10. 100kWh per day would cost more than I pay for rent...
And with two small kids the laundry machine runs at least once per day and the dishwasher at least twice when we both grownups work from home.
I agree that a lot of kWh are needed for heating. But I hope it's, in your case, for less than 6 months a year? Did you notice a difference in consumption in summer and winter months?
I live in a just ok, older, 65m^2 (700sq ft) apartment in the midwest US with one other person. Everything is electric except the water heater.
We average about 30kWh/day in winter and summer, and about 15-20kWh/day in the fall and spring.