Aye not angry in any way, just a little surprised at how much they changed Bill and Frank's relationship. It's pretty much an entire reversal of how it played out in the game. I suppose they needed something to change Joel's motivation towards Ellie which wasn't really the case at this point in the game.
As you say it was a nice, if a little sappy story that was well told and well acted but not really seeing it as the masterpiece that a lot of people are. Taking advantage of the medium I suppose as this wasn't really a story that could be told in the same way in a AAA action game.