Get busy rising, instead.
Those who complain often & much assume that those who do not complain don't struggle and aren't met with difficult times. The fact is -- everybody goes through difficult times, everybody struggles because it's the human condition to experience things--good things, bad things. You're not excused from it. Whoever you're judging isn't excused from it.
The difference is that some people are busy trying to rise above whatever challenges are set forth before them and some are busy nagging about it. But don't get it confused, never assume that a silent person has nothing to complain about- it's just that they've [chosen] not to.