Everything is an illusion...
A minute ago you told me you are still suffering. You may repeat that everything is an illusion and continue suffering. That does not help. The mind is unfocused and adrift. That idea is a blunt tool and can be safely discarded.
We can say the root of psychological suffering is an illusion; that is for sure. Seeking and suffering will continue until that is realized and its truth pervades the mind deeply enough.
Meditate and investigate and find the root. That is the crux.