Well I'm going on the info Daniel has right now in the series and by that info he's made a very bad judgment call as far as his marriage goes.
Yeah, in my advice column on P2X-429, being taken over by a Goa'uld was a frequent cause of marital tension. Usually the Goa'uld partner would become very demanding, sometimes insufferably overbearing, and it can be difficult to restore a nice balance to the relationship.
So first off, Goa'uld partner, don't kill your spouse just because you find them inferior. Human partner, even Goa'uld sometimes need encouragement when they face life's difficulties, such as when their beautiful new fleet gets wiped out by a rival System Lord. Just be there for them, perhaps making them some comfort food and just listening
as they rant and rave about their foiled plans for galactic domination.