The lack of appreciation between people is probably a sympton of a deeper problem. Perhaps the environment is toxically competitive and forces people to play down other people's contributions. Maybe there's a lack of leadership which means that the different parts of the team aren't working together positively or maybe the people there just aren't very good. It's not about a pat on the back either, people that respect the people around them don't need to engage in empty gestures of gratitude, it comes through very naturally.
