first house ruler retrograde in the 8th house

[apinyafe]

I've read in a book which says retrograded first house ruler means that the native may have problem with self worth. In my natal chart, I have retrograded Mercury, the first house ruler, precisely at the house cusp of Capricorn which is my 8th house, and also conjunct my Sun there. So, a very strong 8th house type. Does retrograded first house ruler have strong negative effect?

AS far as I know, the 8th house in many other signs can have some positive characteristics like in Virgo or Leo, but if it appears to be Capricorn, it seems to have negative effects stronger than the others. Is it true or not? Other than having strong self-transformative power, does 8th house Capi have some other positive features?

My Saturn is in Sagis. which is my 7th house. I have tremendous problem with some one I attach to. In Karmic astrology, Saturn in the 7th house means the native has some Karmic debt with his or her partner. But in my case, I always feel the other way round, namely that the significant person owes me. What Karmic problem can be caused by Saturn in the 7th house, and what is the way out?

Thank you very much for your attention.