i would say leave the group and the guy alone.
you seem to be doubtful of his knowledge, ability etc.
if you want a group, there are some here and elsewhere.
if you are into the guy, well that is another story.
i do not know what you can do about that.
if you believe your knowledge exceeds his, then you will know soon enough what to do.
sounds like you may have options.
you might want to choose an option and stick with it until or unless you find it does not behoove you.
nothing has to be permanent.
you can find your way with out or with the "leader" person.