I'm not quitting destiny anytime soon but my advice would just be to wait. Don't delete your memory because you will be mad at yourself for the time and money wasted. Destiny is a "10 year plan" they say. To be honest, there are bumps along the road, but they've accomplished a lot. There may be things that will bring you back. Feel free to leave and do other things but if something does come back, don't make yourself start all over. Good luck!