I came in late to the TV series, maybe 4rth, Just watching the first one for the first time. Yeah, I get Livia is bit naggy on the phone but he's just so dismissive and horrible and over the rest of the series he shags anyone who gives him the slightest encouragement.
SPOILER
Then, in the final episode, when Livia has finally had enough and probably too old to have kids, she dumps him, only to have him ride off into the sunset with the new forensic officer.
He may be a great detective but even for fictional detectives, he's more than a dick than most.