Small adults who use gaming PC's - whilst working, my laptop, two screens and a docking stations uses 45w, same with MrsF and there is usually one of us WFH each day. Gaming PC - uses 200w just idling (3 screens), and upto 500w gaming - we've checked. Just looked now, and son's machine has used 16 KWH over the week, so a little over 2 KWh a day. Multiply this by 2 for daughter's PC.
So 4 KWh a day or more - the machines are on in the evenings only - daughter's on now as she starts Uni next week, and that's idling at 126w (one less screen).
Don't have teens/young adults is the answer ! Speaking to my brother, he was talking with his business partner, and she can't believe how little he uses - large 4 bed detached - two adults working and a 4 year old. His business partner has 3 teens all with gaming set ups.