The danger here is that others might be happy with the pace and lack of stress, or they might simply not be good enough to do any better. In either case, they're happy with the situation, and don't want it to change.
If you do good work, they'll fear managers might notice, and it'll make them look bad. So they won't be happy with that. They'll sabotage you, bully you, not proactively tell you things you don't know you don't know, etc.
Before you start that fight, make sure you want to fight that fight, and that if it happens you stand a good chance of winning.
Otherwise you'll just put in more effort than now, and the result will be that more people than now will hate you, and eventually you'll get fired because your work will suck because your colleagues have deliberately withheld information.
If you do good work, they'll fear managers might notice, and it'll make them look bad. So they won't be happy with that. They'll sabotage you, bully you, not proactively tell you things you don't know you don't know, etc.
Before you start that fight, make sure you want to fight that fight, and that if it happens you stand a good chance of winning.
Otherwise you'll just put in more effort than now, and the result will be that more people than now will hate you, and eventually you'll get fired because your work will suck because your colleagues have deliberately withheld information.