Windshield problems of the 2002 Mitsubishi Diamante

My front windshield was fogging up every time I used the heater and a smell of coolant inside my car--nasty film was left, found out it was a heater core problem. Sometimes the fog would take 20 minutes to clear up with defroster on highest settings. These problems are all over the internet with Mitsubishi Diamantes. I am surprised that these have never been recalled for safety reasons.

The black metal strip above the windshield came off while driving. All the plastic clips that attach the windshield to the strip were broken, and some were even missing upon inspection. I purchased the vehicle used from a dealership, and got a carfax report that showed the vehicle suffered no prior damage and had no prior accidents whatsoever.