Isn't bitter love and shallow love a literary device? If so, can you help me figure out which one it is? Please and Thank you

Answer 1

There's no way to tell unless you provide sentences in which these words occur. So far, they are simply descriptive adjectives and the nouns they describe.

Answer 2

"I'ma rain, I'ma rain on this bitter love"
"I'ma wade, I'ma wave through your shallow love"

Answer 3

There's no rhyme since the last words in each line are already identical.

There's a whole lot of repetition in both rhythm and sound in these two lines, though.
https://literarydevices.net/repetition/