There is NO SUCH THING as generational curses. People make bad decisions & the result is bad outcome. Bad outcomes are consequences of bad life choices & decision making no more no less.
Bad outcomes can pertain to individuals or generations. Individuals & generations based upon particular environments make bad, uninformed, or unenlightened decisions & life choices that can have repercussions(not curses) individually or even generationally. For example, many lower income individuals are that way because of bad, even stupid decisions. They refuse to think about the ramifications of their decisions thus they & their children suffer. Unless their children become more informed & educated, they will make the same inane decisions that their parents make, thus the generational cycle of poverty continues.
In conclusion. bad outcome results from poor decision making, lack of planning, & thinking in the present instead of having long-term thinking. People learn what is in their familial & surrounding environment. If it is bad, they will become negative & impart this negative teaching unto their children & so on down the generations.