Both the electric and the gas usage are very high. Elec being hammered by dryer and aircon will certainly add to it but that's still very high. I'm expecting to use around 3500kWh/year in electric at our new house for two of us, including my EV charging. Do you have other electrical load? NAS, servers, that kind of thing?
Me and partner used about 12000kWh/year in gas, in an old Victorian terrace which haemorrhaged heat so heating was working hard all the time. We're expecting to use around 9000kWh/year at our new, 3-bed detached house. So for you to use over 23,000kWh of gas in a year is obscenely high, even accounting for double the amount of people needing hot water. Do you have your heating thermostat set to 23C or something mental like that?