2004 Chrysler Pacifica wipers, windshield & visibility problems

Visibility we have had 6 parking lot collisions since acquiring our car in 2003. The visibility when maneuvering is terrible. We have parked in the same parking lot for 24 years in a variety of cars and suv's and have never had a collision. In this car, we have had collisions resulting from poor visibility when pulling in to park, but more so when backing up. The blind spots are significant and dangerous.

Windshield wipers freeze in light to heavy snow. Defroster pattern not low enough or wide enough. Windshield has ice form on it when the wipers clear the defrosted part of windshield. Ice then forms on wipers and fails to clear windshield. Car has to be stopped and manually cleared of ice and snow.