My last boyfriend purposely demotivated me from doing anything with my life. He discouraged me from going to college, going out and doing new things, seeing a therapist, anything that would make my life better. When I thought about going to Job Corps, he told me I was too sensitive and weak to hack it there. He purposely hindered me multiple times because he was afraid that if I made anything of myself, that I'd decide he wasn't good enough and leave him. He also didn't want me being near other men.
So in some cases, one significant other is hindrance and not a help.