Look how this C opponent landed on him. I like the kid, but C'mon people, Algieri is completely in over his head. https://www.youtube.com/watch?v=M57IbULtem8
He improved his D since then. It might not be enough against Pac, but based on this fight, there was no reason to believe that he should have been able to defeat Taylor, let alone Provodnikov.
I think the main problem with Algeri is he isn't fast enough. He may have looked fast against Ruslan, but most fighters would lol.