I loved the first season which I would have rated an 8. The rating had to come down though for the remaining seasons - the decline was slow but real. I loved each of the three main characters to begin with, but Alex just started to drive me crazy and become really unlikeable in the subsequent seasons, esp 3 and 4. I was not rooting for him at all.
Talk about an attention seeking narcissist!
Similarly the daughter became as dull as dishwater as the series progressed. What made me see it all through until the end was the wonderful Michaela Watkins. I find her performances are always nuanced and her timing is fantastic (I know a lot of comic timing may be down to directors/editors etc, but I'm giving her credit).
In conclusion, while I was watching the series finale, I was really itching for the episode to end so that I could leave the series behind me, a series which was only a shadow of its original self.