Sooner or later you will face problems that might be a bit hard to swallow. The can be so painful and difficult to deal with such that it is a bit unconventional to not start complaining about them. However, complaining will not remove the problem, nor will bring a beneficial result. Taking the means of solving the problems will change the outcome.
In fact, complaining can be usually seen as a deficiency of the ability of taking responsibility about the things that happen to us. When we are ready to accept the reality and use our finite willpower to solve the problem, then there is no much room for complains, because we will sooner or later encounter different pathways that can change the things for the better.
There are people who might be seen as perfections, such that they do not have any problems at all, because they are always on top of the things and do not make any attempt to complain. However, if you would take a closer look at their lives, you might be surprised that they might even have more problems than a usual person, but they have found and have been using different strategies to tackle them. Their obstacles became their way.
It is true that there are things that are out of your control and that cannot be directed by you, nonetheless you can start to give different interpretations about the same events. The same dress was perceived as blue and black by some people, but also as white and yellow by some other people. The same thing can happen to your problems: you might see it as a curse and find yourself unable to even take the first step of solving it.
