#3 Bray Wyatt
"Wait a minute...how has Bray Wyatt been misused in 2017? Wasn't he WWE Champion earlier this year?"
Yes, Bray Wyatt was booked fairly well at the beginning of the year, as it looked like WWE was finally going to let him realize his full potential. He won the WWE Championship at the Elimination Chamber, but his reign was short-lived, as he was fed to Randy Orton at WrestleMania 33. He was then drafted to RAW out of nowhere, despite having been booked in a "House of Horrors" match for the WWE Championship against Orton at Payback.
The match was switched to a non-title bout as a result and, just like their first encounter, failed to deliver. Though Wyatt won, he only did so with the help of Jinder Mahal. This seems to be an ongoing trend with Wyatt - he loses often, but when he doesn't lose, he wins by way of shenanigans.
After this, it seemed as if WWE was just throwing Wyatt wherever they could. He feuded with Seth Rollins because Seth had nothing to do, then he feuded with Finn Bálor because he had nothing to do. While he did beat Seth (again, because of shenanigans), he was more-or-less humiliated by Finn, who beat him in two consecutive PPV bouts. For whatever reason, WWE decided to continue this monotonous feud by having Bray assume the role of "Sister Abigail".
Yes! After all of that mystery, after years and years of build, Sister Abigail turned out to just be Bray Wyatt with an Instagram filter and a voice changer...drink it in.
They could have made this guy the spiritual successor to The Undertaker, but lately, he's looked a bit more like Mordecai. Luckily, he's only 30, so WWE still has plenty of time to right their wrongs.