One of the issues is the agents, Delta isn't hardcore about the door being closed 10mins prior. I would bet if Delta was serious about door close at 10 prior that would change things. Many Delta agents tell us that they can't close the cabin door until 4-5 mins and if they close it any sooner they get in trouble. The agents automatically put all delays on us and the company doesn't do a very good job following up and seeing if it really was our fault. The Delta planes aren't new either and our MX does not do a good job at keeping parts on hand to fix things. They wait until it's broken to order something. The MX side is extremely short staffed, especially in LAX. They have a new supervisor that it creating quite the stir and won't let anyone work overtime even though the shift is short on mechanics. Not to mention he and the DOM are buddies so he gets away with his actions.