First of all there's the very real possibility that your partners were rambling due to nerves, rather than because they failed to do any sort of preparation beforehand. But regardless of whether they did practice independently or not, it frankly doesn't matter if you weren't the official leader: if you saw issues with how the group was being led, and if you cared that much about the presentation, you should have spoken up and made sure those issues were being addressed (and should have gone to the professor for help if you couldn't get your team to agree to get its act in gear). When you get into the real world, where this project could have made the difference between you getting paid or being unemployed, you won't be able to use the excuse, "But it's not my fault; I wasn't the leader."Newtonyd said:So no, it's not my fault. I'm not their mother. Moreover, for a project like this you don't need everyone to meet up. Coordination is hardly the issue when you just need a sequence of people to say their 4 minute sections. You just need people to know their 4 minutes (they said they all did). Is it my fault that my teammates were liars?
This is one point of having group projects in college: to prepare you for the real world. And in the real world, you will have to deal with a broad range of colleagues (some of which are extremely competant people, and some of which are significantly worse than the people in your group). And in the real world, your client's not going to cut you any slack for allowing the rest of your group to drag you down with them, regardless of just how bad they truly were. You will be held equally accountable for your group's presentation. Accordingly, you have to learn how to work with other people (which includes making sure things get done, understanding how others work so that you can ensure those things get done, etc). If you don't, then you are indirectly guilty for anything that happens as a result.
You made a mistake (which is a normal, common occurrence in college), so accept it, learn from it, and move on.