Complex sentence: Laird's vulgar, gregarious, and blunt personality are slightly overwhelming for Barb and Scott, but causes Ned to downright despise him, however Stephanie insists that he's a nice person and that he makes her happy.
Split into simpler sentences: Laird's vulgar, gregarious, and blunt personality are slightly overwhelming for Barb and Scott, but cause Ned to downright despise him. However, Stephanie insists that he's a nice person and that he makes her happy.