Because it’s probably a free verse poem which meaning the poem can be any structure and can have all different kinds of lines and stanzas.
This is a run on sentence because a run on sentence has no word to join them together!
He says there a bad crowd referring to that Gatsby is better than them In the sense that he is not stuck up like them
Answer:
I agree with you reading is dum but you have to do so they know you know how and they think your smart