3 different issues...
First the 2 easy ones...
"Soul ties" are "modern psychology meets charismatic theology," and it not mentioned in scripture at all. It's basically trying to spiritualize bad relationships/bad relationship skills, so that one can just "pray a prayer" and "fix everything" rather than actually having to learn how to establish healthy boundaries in one's life.
A "Jezebel Spirit", while never mentioned in scripture per se, is used by many to describe a rebellious/controlling "spirit" within a person-- be that an attitude or an actual demonic spirit. It is (obviously) taken from Jezebel in scripture who dominated her weak husband, fought against the true prophets of God, and led the people into idol worship.
"Generational curses" are the more difficult of the three to discuss, since there are scriptures talking about the "sins of the fathers visited on the children to the 3rd and 4th generation." Scripture is also clear that the grace/mercy of God is visited to the 1000th generation, so it would definitely seem that God's grace is far greater in its impact (even on future generations) than any sin could ever be. Again, many try to spiritualize these things to make it so that one can "fix" everything by praying a "magical" prayer to "break the curse". In reality, it's about breaking patterns of sinful behavior. For example, most alcoholics are the children of alcoholics-- because they learned the behavior by living in a dysfunctional household. One has to allow the grace of God to bring change so that one doesn't continue in those destructive behaviors learned.