Marriages are at risk when one spouse is ambitious, successful, talented, popular, motivated, etc. and the other spouse takes a perceived backseat, is jealous, or has low self-esteem. The threatened or intimidated spouse may find ways to sabotage the relationship.
You have to recognize the sabotage before anything can be done about it. Some spouses may say one thing and do another, be conveniently forgetful, or show selective incompetence. Learn more about the reasons why a spouse may sabotage a marriage and ways that sabotage may play out in a marriage.