You need help bro.
When I was younger I only dated Japanese girls from Japan (they knew their place)

just kidding. Women can't be stereo typed. If you're not getting on with American women, think about dating others. You are stereo typing women in porn, they all serve one purpose, lust of the flesh.
Desire for sex is not a sin, it is neutral, a part of God's design. It only becomes sinful when I allow that desire to lead me to look at women as objects for lustful intercourse.
Even when you do find a wife you will still have the problem of going beyond the neutral natural desire with your wife and lust after women. So how does this stop? That's the key question isn't it? None of us enjoys failing in the same things day after day and going thru what you called the cycle. The bible teaches that we can experience victory over sinning in our lives. Not flawless, not sinless but victory over the domination of sin in our walk with Christ. The provision from God to overcome this addiction is divine enablement combined with appropriating grace. Your first step is to recognize you are in Christ and Christ has chosen you as His own, you are a gift from God the Father to Christ. Your second step is to dedicate yourself as a servant to God (Romans 12). Don't worry about your current struggle and addiction, don't let it stop you from making this one time dedication to God. The Greek tense for dedication in Rom12 is in the aorist tense meaning it is done once, one time, no walking down the isle every Sunday and rededicating, do it once, do it now. By getting saved, you were bought out of the slave market of sin and set free. You're free but you're not a servant of the Most High God which is why being left to serve yourself, you're in this struggle which at present seems like there's no way out. There is a way and it starts with the decision to become a servant of Messiah resulting in being a slave to righteousness. What you don't realize is that part of God's sanctification plan. Take the step, dedicate yourself and then step three - your spiritual gifts. Every believer has a spiritual gift God provided to him for serving Him by using that gift to build upon the foundation of the church (other believers). If you don't use your gift how am I supposed to get better? If I don't use my gift how can you get better? If you don't know what your gift is, please PM me and provide your email and I'll pdf you a manuscript to study as you discover what gift God provided (divine enablement). You will discover that by this simple act of faith your addiction will die away and your service to God will preoccupy your mind, you will be controlled by the new born human spirit and the Holy Spirit will make you into a fruitful tree in The Body of Christ. Women need this type of men, solid servants to The Lord. This is exciting brother, make that dedication, don't delay.
Brother joy