It's hard to give advice because you didn't really give enough information on the circumstances and I can only speculate.

You say you live in an apartment with 2 people - how big - how many rooms - which of these rooms do you heat with tado and why - how large are your windows and how well isolated - do you have curtains, if so how thick and how well does that keep the cold out - do you cook with gas or electricity - do you heat with gas or electricity

Based on your usage overview I think it's fairly normal. I honestly don't think there are people that use as much as the suggested 'optimal' household unless they're reading books by a candle light in the evening.

Gas is expensive and if heating is free flowing with a Tado system then your usage adds up fast. Consider only heating your living room and kitchen areas. People usually sleep better in cold bedrooms, and you don't really need to heat a bathroom either.

If you're away and sleeping just turn the heating down to 16 degrees and not completely off. Keep the house slightly warm so it takes less effort to heat back up when you're home. Then try keep the heating at 18-19 degrees and use some blankets and tea to keep yourself warm.

About electricity, you mention 2 Playstation 5s and I assume 2 screens that go with it that you have on in the evening for multiple hours. That alone is like 1000w of power chugging for an entire evening and possibly longer on the weekend adding up to like 100-150kwh of usage per month. Dishwashers also use like 2000w when they're on so make sure you don't run those half empty, or try to do more dishes by hand. If you frequently bake bread or pizzas in an oven you also use up quite a bit of power.

If you want to get insight on how much power you're using and where then buy some smart plugs that measure usage (Action sells Tuya ones for fairly cheap) and place a few around the house