For me that would be Metal Gear Solid 4, at first I was so engaged with it due to the story and how it wrapped up years of loose ends and plot points + the stealth gameplay. Years went by and I started to see (many) holes within the game, Now I don´t like how MGS4 prioritize story to a fault, there´re long cutscene sequences with short gameplay segments (there´s a point in the game where you´re watching 1hs and 30m of cutscene non-stop followed by at most 10 minutes of gameplay that´s then interrupted by another minutes of cutscenes, it´s insane!!!! Doesn´t help that the game has over 9 hours of cutscenes. The long sequence of cutscene also hindered the flow of the game a lot, there´re many examples of the above throught the whole run of the game. What´s the game you liked at first but you started to like it less overtime?