After trying to revisit Anno 1800, I've given some thought to something that I feel is undermining my ability to enjoy the game: I don't hate BUILDING, I hate REBUILDING. Too much content that involves going back to existing cities/islands and tearing stuff up.
Some of this applies to the base game (railroads/electricity, mostly) but stuff like hotels, haciendas, so much crap that requires existing islands to be rebuilt, it's where it starts to get real exhausting for me. I know plenty "can" be planned ahead of time but there's limits to it, you know? Just a thought.