Knowing your options doesn't take a whole heck of a lot work. Before your trip, take a few minutes to run your destination on something like Priceline which will come back with all sorts of options on various carriers.Print it and keep it in your pocket. The few times I've had an issue, I have found offering some possible options, rather than asking what options are, is appreciated by usually flustered agents.
Ranting and raving MAY get you rebooked, but expect a good view of the lavatory. And your luggage will be headed the other way. Don't be an AH.