I think that Jennie is a judgmental little snot. You can't blame someone for wrecking a marriage -- the only people who can "wreck" a marriage are the people in it. There's a difference between giving advice and trying to impose your will on someone, and she crossed that line by threatening to not be his friend any more if he picks Trish. Trish is the only one on the show with any personality at all. The rest of the women do nothing but complain about her -- how fascinating.
Suzie is nice and everything, but what grown woman jumps up and down and squeals?
I'm glad he got rid of Jesse and the annoying cheerleader.