#1 Alexa Bliss vs. Bayley

A bad feud can squander a wrestler's momentum, but it usually isn't fatal. Good booking afterwards can, in time, usually recover what was lost, and then some. The Alexa Bliss vs. Bayley feud, however, may have permanently damaged the latter, and its negative effects on the entire RAW women's division are still being felt as 2017 comes to a close.
When Alexa Bliss was sent to RAW after WrestleMania, she was immediately inserted into the title picture. As the recent SmackDown women's champion, that wasn't too out of the ordinary, but it did put a damper on any potential heel turn from Sasha Banks, which had been hinted at beforehand. This missed opportunity would have negative long-term effects for her, as she's currently treading water.
Meanwhile, Alexa Bliss steamrolled through the feud with the champion, coming out on top of every segment and every match, taking the championship from Bayley in her hometown and then humiliating her in the infamous Kendo Stick on a Pole match at Extreme Rules a few weeks later. Bayley looked like a complete idiot through all of it, acquiring a stain that she has still not managed to wash off.
At the beginning of the year, Bayley was a well-liked babyface that toppled Charlotte and had a promising future. In December, she's only one or two steps removed from an enhancement talent, and that's mostly thanks to this feud. With the return of Paige, the arrival of Asuka, and the debut of Mandy Rose and Sonya Deville, it's unlikely Bayley will be pushed prominently for the foreseeable future, at least on RAW, and even on SmackDown, she won't have anywhere near the buzz she used to. Feuding with Alexa may well have ruined her stock forever.
Of course, there was also the worst-of-all-time worthy segment in "Bayley: This is Your Life," which alone would have been worthy of putting this feud on a list of worst of the year, but added to everything else, it makes it the no-brainer Razzie winner.
Becky Lynch has been challenged HERE.