How could Rey Mysterio benefit from halting Dolph Ziggler’s career?

it is a well known fact that Dolph Ziggler was set to receive a huge push mid last year, but a few problems backstage and Rey was unwilling to drop the title to Dolph, effectively killing his career for now. DOlph has done little since his altercation with Rey and it seems dark if he will ever see the light of the upper mid card again

so how could Rey benefit from this?
Will Dolph ever reach the level of stardom he had mid last year again?

BQ(May be unrelated to wrestling, does not need to be answered for BA)

Name the song, the group that did the song, and the group member that does this verse

If I could capture the rage of today’s youth and bottle it
Crush the glass from my bare hands and swallow it
Then spit it back in the faces of you racists
and hypocrites who think the same shit but don’t say shit
You Liberace’s, Versace’s, and you nazis
Watch me, cause you thinking you got me in this hot seat
You motherfuckers wanna JUDGE me cause you’re NOT me
You’ll never STOP me, I’m TOP speed as you POP me
I came to save these new generations of babies
from parents who failed to raise ’em cause they’re lazy
to grow to praise me I’m makin ’em go crazy
That’s how I got this whole nation to embrace me
And you fugazi if you think I’ma admit wrong
I cripple any hypocritic critic I’m sic’d on
And this song is for any kid who gets picked on
A sick song to retaliate to, and it’s called..