I would consider a significant portion of existing managers to be exceptionally ineffective. Rather, if there were a majority that were effective, we'd be approaching Singularity significantly faster. The management case specified that the employee's heart was in the in the right place, so I must assume they aren't slacking off at the very least.
Suicidal tendencies, who would be happier with who, plenty of fish in the sea, and so on are examples of why dating is so ridiculously complicated. My own personal conclusion is that I am better off single for reasons you've described well thus far. I haven't done all the math personally, but it is my understanding that society naturally evolves the most stables practices; things do not become taboo for no reason, nor are taboo practices outright forbidden. The few that practice the taboo tend to reinforce the wisdom behind tabooing the practice. It seems like a significantly Bayesian-like process to me.
it is my understanding that society naturally evolves the most stables practices
"Stable" in game theory generally means that no party can make themselves better off unilaterally. (Consider, for example, the stable marriage problem.) Utilitarianism is the correct descriptive observation that socially maximal situations might not be locally maximal, and the dubious prescriptive claim that agents should go for the globally maximal situation because everyone's preferences are equally valuable.
Utilitarianism seems to indicate that the greatest good for the most people generally revolves around their feelings. A person feeling happy and confident is a desired state, a person in pain and misery is undesirable.
But what about taking selfish actions that hurt another person's feelings? If I'm in a relationship and breaking up with her would hurt her feelings, does that mean I have a moral obligation to stay with her? If I have an employee who is well-meaning but isn't working out, am I morally allowed to fire him? Or what about at a club? A guy is talking to a woman, and she's ready to go home with him. I could socially tool him and take her home myself, but doing so would cause him greater unhappiness than I would have felt if I'd left them alone.
In a nutshell, does utilitarianism state that I am morally obliged to curb my selfish desires so that other people can be happy?