Opinions of Macbeth become worse and worse until he is considered a bloody tyrant.
Macbeth is considered a valiant and loyal soldier at the beginning of the play, but it soon becomes clear that he is the one that killed the beloved Duncan. Malcolm and Macduff discuss his betrayal.
Fit to govern?
No, not to live. O nation miserable!
With an untitled tyrant bloody-scepter'd,
When shalt thou see thy wholesome days again,
Since that the truest issue of thy throne(120)
By his own interdiction stands accursed,
And does blaspheme his breed? (Act 4, Scene 3)
Although they are clearly biased, there is definitely evidence that no one else approves of Macbeth’s actions either. The reports of how things are going in Scotland are not at all good. There is a supernaturally-influenced darkness pervading the kingdom.
For most of the rest of the play, Macbeth is referred to as simply “the tyrant,” and hated by everyone.
Thou liest, abhorred tyrant; with my sword
I'll prove the lie thou speak'st. (Act 5, Scene 7)
Lady Macbeth has killed herself because of what her husband has become. Most of his servants have defected or stay only because they are afraid. When Macduff finally kills Macbeth, there is great celebration.
In the end, there is almost no one supporting Macbeth. His mental instability and arrogance make him more and more dangerous and frustrate and frighten his subjects. Malcolm does not just want to get his rightful place back, be also wants to save his country from the reign of terror it has experienced under Macbeth, who was never interested in protecting his people. Macbeth wanted power for power's sake, and did not pay much attention to being an actual leader of any kind. There is celebration when he dies in the end.