Missed opportunities
Many people in life, myself included, have missed out on opportunities. Sometimes it was a scheduling conflict, a transportation issue, or a demand from another party that stopped us from doing something we really wanted to do. Some of the thing we miss out on are trivial, some a serious, and many are somewhere in between. A person who chronically does this is a person who does not wish to socialize and also criticize those who want to do social things. Essentially, this is what the person "does for a living": In that they choose not to have a social life and rip apart the self esteem of others around them. They find fault or reason as to how and why someone should not do something, it's a waste of time, it's ridiculous, it's boring, etc. All or some of these observations may be true, but the ultimate problem is that the one who constantly does this is setting themselves up for a lifetime of regrets. No one regrets that they took that crazy trip...