Monopoly really isn't a bad game if you actually play it correctly. I swear, 99% of people add all these shitty "house rules" that totally break the game balance and make it so that the game never ends. If you play it by the rules in the rulebook (and nothing else) a game of Monopoly should only take like an hour, tops.
I still wouldn't say it's a great game but that's because it's very luck-based. Half the game is just where you happen to land on the first trip around the board.