Monopoly was based on “The Landord’s Game” and was never meant to teach economic decision making.
It was meant to promote Georgism and demonstrate the power of landlords, for which that “fault” is a feature.
2. rents are rules. You cannot be creative with rents. I.e. rent control
3. there are no predictable expenses to owning property
4. the only business you can engage in is property
5. there is no supply & demand at work
6. what properties you acquire is completely random
7. the outcome of the game is controlled by a roll of the dice. There is a strategy to Monopoly, but it is very simple, and soon everyone learns it and that ceases to be a choice
8. Not being able to collect rents on mortgaged properties is quite unlike any actual business
9. No interest is paid on debt
The biggest divergence from an actual marketplace is it is designed to be zero-sum. Markets are not zero-sum.
(I'm aware you can't technically bankrupt the bank but you get the idea).
You win by taking out lots of debt and getting lucky. Pretty much like real life.
... during economic crisis... to stabilize the money supply.
I expect a banking simulator would hew to the ubiquitous propaganda that the Fed is there to stabilize the money supply. (It's actual purpose is to inflate the money. See Freidman's "Monetary History of the United States")