99.9% of 250 hour co pilots as you term them are absolutely professional and willing to learn every step of the way. They have to start somewhere. Don't begrudge them their luck in getting a job so early into their flying careers.
Quit the slagging and derogative remarks. You too had only 250 hours. Of course there will be tossers out there with 250 hours who believe they have nothing to learn. Don't worry, that will be either be beaten out of them, or some day they will scare themselves into realising they have a world of learning to do. In the same vane there are plenty of people with 5000 hours who have those same attitude defects!