Tyranny is strictly forbidden in ISLAM for ALLAH SWT Himself forbids tyranny on Himself and He has also forbidden such tyranny upon mankind. So NEVER EVER be cruel, especially to HIS SERVANTS.
Tyranny has its limits and duration. When it has gone beyond the limits and duration, then WAIT for HIS painful punishment to befall upon you in this world and the hereafter.
Allah SWT has said in the Holy Quran, Chapter An-Nahl, Verse 61
وَلَوۡ يُؤَاخِذُ ٱللَّهُ ٱلنَّاسَ بِظُلۡمِهِم مَّا تَرَكَ عَلَيۡهَا مِن دَآبَّةٖ وَلَٰكِن يُؤَخِّرُهُمۡ إِلَىٰٓ أَجَلٖ مُّسَمّٗىۖ فَإِذَا جَآءَ أَجَلُهُمۡ لَا يَسۡتَـٔۡخِرُونَ سَاعَةٗ وَلَا يَسۡتَقۡدِمُونَ
And if Allah were to impose blame on the people for their wrongdoing, He would not have left upon the earth any creature, but He defers them for a specified term. And when their term has come, they will not remain behind an hour, nor will they precede [it].
Chapter Ar-Ra’d, Verse 6
وَإِنَّ رَبَّكَ لَذُو مَغۡفِرَةٖ لِّلنَّاسِ عَلَىٰ ظُلۡمِهِمۡۖ وَإِنَّ رَبَّكَ لَشَدِيدُ ٱلۡعِقَابِ
And indeed, your Lord is full of forgiveness for the people despite their wrongdoing, and indeed, your Lord is severe in penalty.
As such, let us return to Allah swt
وَأَنِيبُوٓاْ إِلَىٰ رَبِّكُمۡ وَأَسۡلِمُواْ لَهُۥ مِن قَبۡلِ أَن يَأۡتِيَكُمُ ٱلۡعَذَابُ ثُمَّ لَا تُنصَرُونَ
And return to your Lord and submit to Him before the punishment comes to you, then you will not be helped. (Chapter Az-Zumar Verse 54)
