This is a very unfair attack on Mother Teresa.
Christians on the way to mystical union with God undergo terrible trials of Faith where things are so black it seems God has abandoned them. Remember Christ on the Cross? “My God, My God, why have you forsaken me?” Does Christ fail your standard because He doubted?
The mystical path mirrors the path of Calvary - persecution, torture, insults, false accusations, trials of Faith, abandonment, death and resurrection. Some experience a spiritual resurrection in this life, others suffer until death. The Church is going through this process right now.
If anyone wants to understand the concept read Interior Castle by St. Teresa of Avila. St. John of the Cross is excellent as well but his works are a little more intense. Interior Castle is approachable and easier reading.
With all due respect, I cannot understand how this can be considered an "unfair attack". The person who was responsible for her canonization is the same one who is publishing the papers:
Doesn't it seem more reasonable that she suffered these emotions?