I stopped watching after the second episode of the second season. They changed the actress playing the oldest daughter, and changed the dynamic between daughter and dad. During season one, she was always liberal, but being a single mom taught her the hard way that dad just might be right about a few things.
In season two, daughter automatically assumes dad is wrong on everything and now has her baby daddy around who also is liberal and gangs up on dad.
Most infuriating is how dad acts so establishment republican and ends up modifying his views to “get along”.
I stopped three or four episodes into the first season, when ABC predictably introduced a lesbian couple into the storyline. I checked in for the much-ballyhooed second season opener, and checked out again. That episode depicted Tim trying to convince his own family to vote for Romney, and painted him as an Archie Bunker-ish manic Republican who (as you put it) needs to "get along".
I stopped watching for the exact same reason. That new daughter is a disaster. Really sucked all the humor out of the show.
Boom and we have a winner!