JohnnyFootball
GerAlt-Right. Ciriously.
It's just a bad game filled with grinding, empty worlds, and shallow fetch quests to check boxes for those fans who kept complaining about the loss of "RPG" elements in ME2.
ME3's development issues are well documented. It was initially rushed leading to lots of cut content on Palaven and Thessia that destroyed the mid-game storytelling, but was pushed back for polishing and marketing. Jaavik was removed from the game to sell as DLC. Writers didn't talk to each other. The multiplayer was initially a separate, stand-alone competitive deathmatch FPS that was rebooted and retooled into the co-op TPS add-on we now know.
I can't argue that the third act of ME3 took a noticeable dip in quality as it entered the third act, but I don't buy into it being troubled since they had to cut content. Witches 3 had cut content, but I don't think anybody feels that game was troubled.
But maybe we are defining troubled differently. I define troubled as having the game restarted, people leaving during development, delay after delay.