The least active people on Facebook complain the most about more active people, often about them oversharing.
The person who does not use Twitter or Facebook complains about people wasting their time on the service. He complains and is concerned about privacy issues around sharing!
The least active people in the office complain and criticise the most about the people and teams doing most of the work.
The person who knows the least about a topic, normally is the one criticising the most. Just start the topic of current politics and observe all super experts talking around you!
Just because you don’t have anything useful to share, don’t criticise someone who has something to share, even though it might not be adding value to you or the world – or at least that is what you think. Get over your resentment.