Monopoly is a really bad 1-2 hours game but the absolute worst part is that everyone plays with dumb house-rules to make it last an entire afternoon. Really grinds my gears.
I never refuse to play Monopoly, I'll just say I'll gladly play if we play by the rules. The end result is the same, we never play it. I have never met anyone who wanted to play by the rules. Hell, I never found anyone who knew Monopoly had auctions or mortgage.
The game it was ripped off from The Landlord's Game. It was created to show how landlords and rents were screwing the public and enriching the man at the top.
Was never even meant to be fun. I think it's interesting that people take so long to recognize that it isn't fun, simply because it is presented in the form of a board game. You need to understand games pretty deeply before you can evaluate them, and by that time, modern commercial games have used psychological tricks to addict you rather than actually appealing to your intellectual or emotional interests.