Spiritual attack or i’m a wicked sinner?

For the last two months I’ve been fighting lust, and I feel like I’m losing. I fast, I pray, I cry out to Jesus to free me from this, to fill me with the Holy Spirit, but I continue to gratify the desires of the flesh. I wonder if it’s just my weakness or if there are demons that need to be cast out. I ask Jesus, but nothing happens.

To make matters worse, I discovered that my 73-year-old father has started accessing adult websites on a daily basis, without my mother knowing, which made me wonder where it all comes from: corrupted human nature, or evil spirits attacking my family?

Honestly, I don’t know if I have the authority to cast out demons, and I certainly don’t have the strength to overcome lust alone.

I don’t want to die the eternal death, but I ask Christ for help and when I sin, I get desperate because I don’t see something immediately happening to free me and my house from it.

Am I doing something wrong, or failing to do something to stop it?