i will look into that interesting subject

Not sure i agree, but always open to new things... i have been in deliverances where christians have been set free, from depression and all manner of oppressions and demons have been seen leaving....
Here is the Biblical usage of the word "oppressed". Notice it is never used in connection to demons with believers. These next paragraphs are from
Power Encounter: A Pentecostal Perspective by Opal L. Reddin. It comes from Central Bible College Press of the Assemblies of God.
Arndt-Gingrich says, to "oppress"
katadunasteuo is to "control, dominate, exploit, exercise tyrannical rule". Of the three times it occurs in the New Testament only once is it referring to Satan's direct activity. In two other occurrences it refers to
physical bondage. Egypt
oppressed Isreal until God delivered them (Acts 7:6). The rich
oppress the poor and
drag them into court" (James 2:6). These are graphic descriptions of being under the control of enemies.
Acts 10:38 (NLT)
"And no doubt you know that God anointed Jesus of Nazareth with the Holy Spirit and with power. Then Jesus went around doing good and healing all who were
oppressed by the Devil, for God was with him." Note this verse describing Jesus' ministry prior to Calvary, The Resurrection and Pentecost. Also note Jesus
healed all who were oppressed. Most likely this refers to those diseases that were caused by demons.
Should believers claim to be oppressed by Satan? Are they "controled, dominated, exploited, under the tyrannical rule" of Satan? No, no, no The history of the Israelites is the example for our Christian living (1 Cor 10:11) In Egypt they were oppressed (Acts 7:6) but God delivered them. Once they crossed the Red Sea, they were
free! Not perfect, with battles yet to fight, but
no longer oppressed.