No the US automaker unions have not been properly managed. If they were properly managed there wouldn't have been a need for a bailout in the first place. The bailouts were a last resort to try to save the industry. Major change is still needed for the auto makers to survive.
No, auto unions have not been appropriately managed, because workers in unions are paid too highly to sustain the auto industry. It would be nice if everyone earned a six-figure salary, but the auto makers simply cannot afford it. Lawmakers are too easy on unions because they don't want to be seen as offending working people.