I have sun and mercury in very close orb in taurus oppo pluto in scorpio and yes its a very intense aspect.
I'm a female and no I have never been abused. And my father is not ruthless nor a bully. He is the opposite. BUT he himself has been beaten ruthlessly by his sadastic father when growing up.
But he has never beaten me or my siblings.
I'm very strong headed though which has caused a lot of power struggles between my father and I and also between "authorities". This kind of people will challenge authority figures for ex their teachers if they think the teacher is wrong for ex. They hate being controlled but also they theselves wana control people or their evironment. Either for power reasons or out of fear, pluto is the planet of fear.
For ex a mother who bluntly says "no you can absolutely not go out tonight with your friends, its not safe". A controlling mother or father.
This people will also have an amazing self-analysis ability. They can act like their own pscyho analysts and transform themselves as sun helps them to shine light on their pluto.
There is sooo much insightful stuff you can find about pluto-sun aspects when using google.
Pluto is also the planet of repulsion. It acts eithe as a magnet drawing in people, or as a repeller that repells people. The shadow side of pluto. And because pluto is like a magnet it can go the other way around, that the person "draws" bad people into their lives. Not happened to me, I'm too strong willed and don't tolorate bs.
For me having pluto in 3rd house I can some times be repulsives in my way of talking to people, trying to empower them with my own ideas etc.
This site is amazing with great key words regarding planet aspects, just pick and apply!
http://astrofix.net/2011/03/09/sunpluto-aspects/
Quote from astrofix: "
Will power. Wanting to have power over others. Wanting to be powerful. Wanting to have the power that others have. Being involved with the government – for better or worse.
Wanting a powerful position in the world. Needing to show or prove how powerful you are. Needing to show or prove your intensity of purpose. Powerful creative forces. A compulsive personality. An obsessive personality. Pitting yourself against people who are more powerful than you are. Allying yourself with powerful people".