Indeed, it is the “evil slave ” who concludes that the Master is delaying. That evil slave is part of a group described at 2 Peter 3: 3, 4.
(‏ ٢ بط ٣ :‏ ​ ١١ ،‏ ١٢‏ )‏ وَصَفُّ ٱلْعَبْدِ ٱلْأَمِينِ وَهَيْئَتُهُ ٱلْحَاكِمَةُ لَا يَسْتَخِفُّونَ أَبَدًا بِهذِهِ ٱلْكَلِمَاتِ ٱلْبَالِغَةِ ٱلْخُطُورَةِ .‏