If this is the horoscope of the guy you were dating then Yes, debilitated Venus and Rahu in the 12th house is never good. As Venus is the significator of women in the male chart, the person gives less respect to women and wife, therefore marital life has lots of issues. Marital happiness is less. The person likes to be with multiple women. The debilitated Venus and Rahu conjunction is called Stree dosha and Stree dosha is never good for marriage stability.
Blessings,
Navneet Khanna
Astrologer