Building a successful company requires a team with a great attitude. Sometimes, between a winner and a loser comes a sense of who will outlast the other in the market. In most scenarios, the battle is won by those who are assembled with the attitude to win.
If your team has people whose attitudes are not aligned with organizational virtues, the plague will not take long to hit and affect the entire organization.
As a leader, it is your role to focus more on the right attitude than on skill sets. Also, time and again, if needed, course-correct—even if it requires making tough decisions.
As a founder, you are responsible for failure. Success will have many leaders.