Sounds pretty much like me last night, after 2 hours last night I was just bored. Its funny, I've watched a few streamers today and they all seem to pretty much lose interest in doing the missions and story after about an hour and just resort to drive about running people over and gunning people down for another hour or so and then just change game. I dont think the game has much hold (at least not for people like me it seems) and I can see it having a relatively short lifespan
Only played the first one and that sums that one up too.
As a free world game GTA was better as well so didnt give it much time.