OMG yes they do!! If unaddressed through therapy and/or tons of self work, then yeah...it gets sooo much worse. I could just be speaking from my own experience and over generalizing, but I really believe it doesn't get better, until they want to make themselves better.

That just reminded me of my former sister in law, whom is sisters with my former friend, whom is married to the baby brother of my ex. And she told me, he's [my ex] really insecure, actually. yeah...code word for overbearing and controlling, I came to discover. [and then worse than that....over time, many years, got much worse after I had my third child, not that second pregnancy was any better, actually that time frame he befriended 'her'..i'm digressing]