Just take a chill pill, as mine used to say before they went off to uni.
I was eventually pretty relaxed with my 2 - now aged 21 and 19. Their rooms were ALWAYS a mess- in fact my daughters more than my son's.
I had 2 rules only- dirty laundry goes into the wash basket or it doesn't get washed ( even if that meant having no undies or school shirts) and no left over food in rooms for hygiene reasons. As far as poss, no food in rooms, full stop.
Every now and again,(every couple of months??) I'd ask them to hoover and do a clean, and say they couldn't have a lift anywhere unless they did- we live in a small village no pub. transport.
TBH I was more concerned about their A levels etc and their choice of friends ( both fine, BTW) and felt that nagging over bedrooms was a waste of time.
I didn'tlike the look of their rooms, but I leanred to shut the door and let them get on with it.
Now they have both left home, and I really miss them,their rooms are empty and perfectly clean and tidy- I know which I prefer!