There is some sympathy for the Cavaliers because they need to ensure that they do not get into a position at the bottom of the heap in the league. The Heat team has the support of the fans and they want to see them improve but it is tough out there on the NBA Basketball circuit. There are big plans and the intangibles that end to spoil those plans in the long run. When we look at the operation of the NBA Basketball finals we can see that there is a lot to be admired about the way that teams make strategies to win. However things happen that reduce the chances of winning. For example the injuries are just so unpredictable. A player that is perfectly healthy one minute can go out for surgery in a few seconds.
The second issue for the Cavaliers is the opponents. The zeal with which they pursue the ultimate prize will be followed closely by the zeal with which the opponents try to ensure that they are not beaten. There are no lazy teams in the league today. You have to do your work and expect the rewards for the efforts. Those people that are not committed to the working methods will face significant challenges in the way that they handle the system. It could go on for months if there is insufficient regulation of the objectives. The fans are also too anxious for their teams to do well. That can lead to pressure situations that have the negative effects on the team.
Someone that has been playing so well will end up with some stupid mistakes when all that they are facing is the pressure from the fans. I am sure that the Heat fans want the best for their teams but expectations can be difficult to handle. You will need to take the time to see whether the objectives that you have set for the team are achievable and whether it is still worth your while to pursue them. That is the essence of the work that the manager has to do.