It's only just come out, so of course the more competent teams are the only ones who have it done, most people still don't even know what they're doing yet. Give it time and more people will level up and learn the mechanics, and you'll have a better experience. And I've beaten Oryx three times this week, using LFG (well, the Destiny Recruitment forum anyway) to find my fireteams. It can be done. Also I was over 295 when I beat him the first time, and over 300 the second and third time, so focus on getting your level up if you haven't and you can leverage that to ask for higher level teammates. Just don't be one of those scrubs asking for teammates higher level than they are, that's weak, do it with people your level until you level up to the point that people your level are 295+, and you should be set to go to beat Oryx. In the meantime beating everything else before Oryx will give you drops to help you level up.