I'm not going to do any work on a group assignment
Why don't you want to participate in the group project?
I'm tired of doing all the work while some other people are not contributing.
Not wanting to contribute when you've been forced to do all the work in the past is understandable but that's not a good excuse to not pull your own weight. Instead of avoiding work, talk to people and if that does nothing talk to your teacher about their lack of contribution.
That sounds too hard. Why should I do any work at all?
Because this is your assignment too.