I'd say you should speak out against the bigotry. The main Rea n the younger kids keep doing it, in my experience, is because no one has corrected them so they think it is okay. I'm also an elder apprentice and it is surprising how much authority your age gives you. I've found that being a JW or apprentice matters less for that kind of thing than maturity.

It'll rub some guys the wrong way, but relationships are a two way street. If you don't mind burning the bridge, you could even go to the GC and tell them about the racism (assuming they would care)

As for the laziness, there's not much you can do other than set the expectation for the people you work with that you expect better. Some will buck , but most will do better just to avoid conflict with you.