Read the commentaries and come up with something. When you love someone, it is easy to overlook their faults. Christianity is a deeply community centered faith. In fact, if we are not living out Christian fellowship in such a way that we are in one another's homes on a regular basis we are probably not being the church to one another. As you share life together, there will nearly always be some who really don't pull their weight.
Pot lucks are a good example.
Mature believers who can do so will bring an ample helping, sometimes twice as much as they will eat. They will hardly notice that some will not bring nearly as much as they eat. I said hardly notice. They do sometimes notice. But, because they are mature, they do not grumble.