Why is it a losing battle?
From what I’ve seen dealing with friends and coworkers that go from bad relationship to bad relationship;
1. Always a victim, never want to admit their part in their own suffering (choosing the same type of guy over and over, repeatedly going back to the same guy expecting something different etc)
2. Projecting, assuming all guys are the same/act like their exes. Trying to find matching behavior patterns with the new guy and your old ones to confirm your beliefs.
3. Addiction to drama/stress; after so many years of having drama filled relationships you can become addicted to the feeling like with drugs and someone treating you right isn’t going make it go away, you’ll just attempt to cause problems in that relationship.
You’ll be dealing with all this and the average person will have a difficult time unpacking all that relationship trauma and trying to override it with goodness.
Of course this doesn’t apply to all.