@Bruce ********
you probably are staying in dirty/dusty Phnom Penh now and you seem to be unhappy staying in Cambodia for any length of time because of that.
May I suggest you take 2-day trips outside Cambodia? It is easy and cheap travel.
I would recommend you visit:
1) Kampot & Kep city ( I lived in this area for 4 years)
2) Siem Reap (I have been many times to this city)
3) Battambang (I currently live in this city)
Those are nice "country like" areas with a lot of greenery.
You can ask your hotel about the bus ticket and schedule.