How do can i sort this out with my teammates?! HELP?

Oh, I've had some experience like this. Whenever you guys are like expressing your ideas and Adam and Stephen like won't let anybody else express their ideas, tell them that this is a team and everybody has to stick together and listen to everybody and that they're not the only people on the team. Then what you could possibly do is to combine everybody's ideas together so that everybody had a share in the idea. Get what I mean? Good Luck.