I think that scenario is almost universal with condos.My thai friend has just had her annual maintenance bill - 10,200Bt (up from 9,000 last year) and she's not happy about the way things are going. They're skimping on the maintenance - cleaning the corridors less often, lack of security at night, not fixing the faulty entry door etc etc.
And i believe it'll get worse as time goes on.
Back in 2005-2006, when I was "in lub," I looked at a couple of beautiful condo buildings in BKK and I have to wonder what they look like today. On my next trip, I might go look at them, just to confirm my suspicions.
I think what drives this pattern in condo buildings is that is that real estate developments are notorious for being used to launder illicit money in the construction phase, and later used as tax write-offs when their value begins to drop (at least in the USA). The point is, you have a lot of skimping on shoddy materials from the beginning, with the overall goal of the behind the scenes players is to have the project fail.