These companies are just sausage machines squeezin...

These companies are just sausage machines squeezing as many units through their admin/computer system machine as possible. It's a numbers game; higher volume = lower cost per unit to administer = higher profits. Staff turnover is generally high as individual portfolio's become unmanageable, morale is low and service levels nose-dive.
You need to look for small, local company or take over the management yourself. Nobody can effectively manage a property they can only visit once a month/quarter and are too far away to react quickly to a developing situation.